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. 2019 Apr 15;21(4):397. doi: 10.3390/e21040397

Explicit Lump Solitary Wave of Certain Interesting (3+1)-Dimensional Waves in Physics via Some Recent Traveling Wave Methods

Mostafa M A Khater 1,*, Raghda A M Attia 1,2,*, Dianchen Lu 1,*
PMCID: PMC7514887  PMID: 33267111

Abstract

This study investigates the solitary wave solutions of the nonlinear fractional Jimbo–Miwa (JM) equation by using the conformable fractional derivative and some other distinct analytical techniques. The JM equation describes the certain interesting (3+1)-dimensional waves in physics. Moreover, it is considered as a second equation of the famous Painlev’e hierarchy of integrable systems. The fractional conformable derivatives properties were employed to convert it into an ordinary differential equation with an integer order to obtain many novel exact solutions of this model. The conformable fractional derivative is equivalent to the ordinary derivative for the functions that has continuous derivatives up to some desired order over some domain (smooth functions). The obtained solutions for each technique were characterized and compared to illustrate the similarities and differences between them. Profound solutions were concluded to be powerful, easy and effective on the nonlinear partial differential equation.

Keywords: fractional Jimbo–Miwa (JM) equation, explicit lump solitary wave solutions, complex lump solitary wave solutions

1. Introduction

During the last five decades, the nonlinear fractional partial differential equations (NLFPD) have been used for modeling many of the nonlinear phenomena in various fields. For instance, physics, chaos synchronization, continuous-time random walk, mechanical engineering, dynamical and sub-diffusive systems, anomalous diffusive, wave propagation phenomenon and so on. The non-local property is considered as the fundamental advantage of discovering many distinct properties of fractal models. Fractional calculus is a generalization of ordinary calculus, where derivatives and integrals of arbitrary real or complex order are defined. These fractional operators may model more efficiently certain real-world phenomena, especially when the dynamics are affected by constraints inherent to the system. According to the fundamental role of fractal models, an extensive study is applied on the fractional calculus to discover new fractional derivatives that have been defined such as the Riemann–Liouville, Caputo, Hadamard, Riesz, Grünwald–Letnikov, Marchaud, etc. [1,2,3,4,5]. These kinds of derivatives are linear operators and possess some fine properties, but they are not available for all other operational behaviors of a typical first derivative, such as chain rule, quotient rule, semigroup property, and product rule. Failure of previously mentioned derivatives created the interest of many researchers to derive a new derivative until, in 2014, R. Khalil et al. were discovered a new kind of derivative that is a new local fractional derivative which is well-behaved and complies with the computational relationships of the first derivative, called conformable derivative [6,7,8,9,10]. In the following steps, we give the summarized properties of this kind of derivative as follows:

For the given function f:[0,[, then the conformable derivatives of it with order α where α]0,1[, is given by

Dα(f)(t)=limε0f(t+εt1α)f(t)ε (1)

for all t>0. If f is α-differentiable in (0,a), a>0, and limt0+fα(t) exists, then define

f(α)(0)=Dα(f)(t)=limt0+fα(t). (2)

For classical definition of RL and Caputo on polynomial, we see the conformable derivative coincides with them such as it takes the following definition

Dα(tm)=mtmα, (3)

where m is arbitrary constant.

For chain rule, quotient rule and semi group property, we see the properties of conformable derivative given by

Dα(af+bg)=aDα(f)+bDα(g), (4)

where a and b are arbitrary constants.

Dα(λ)=0, (5)

where λ is arbitrary constant.

Dα(fg)=fDα(g)+gDα(f), (6)
Dαfg=gDα(f)fDα(g)g2 (7)

and also

Dα(f)(t)=t1αdfdt(t) (8)

when f is differentiable. According to these properties and definitions of conformable fractional derivative, it is equivalent to the ordinary derivative for smooth functions [11,12].

Definition 1.

The local fractional derivatives:

let k:[a,b] be a continuous nonnegative map such that k(t)0, whenever t>a. Given a function f:[a,b] and α(0,1) a real, we say that f is α-differentiable at t>a, with respect to kernel k, if the limit that given by Equation (1), exists. The α derivative at t=a is defined by

f(α)(t)=limta+f(α)(t) (9)

if the limit exists.

Consider the limit α1. In this case, for t>a, we obtain the classical definition of the fraction that is matched with conformable fractional derivative definition. Based on the conformable derivative definition, the fractional models convert to nonlinear ordinary differential equations with integer order. In this step, the contribution of both analytical and numerical schemes have started to study explicit solutions for these models and for this purpose, many analytical and approximate schemes have been derived such as exp (ϕ(Θ))-expansion, improved F-expansion, extended (GG)-expansion, extended tanh- function, simplest and extended simplest equation, generalized Riccati expansion and sinh-Gordon expansion, Riccati–Bernoulli Sub-ODE, and modified Khater methods to discover more physical and dynamical properties of these models. For further information about these methods, you can see [13,14,15,16,17,18,19,20,21,22,23,24,25,26,27].

This research applies a nine recent methods to the nonlinear time fractional Jimbo–Miwa (JM) equation for studying the properties of exact and solitary wave solutions. Moreover, we study the performance of a novel technique that has called the modified auxiliary equation method (modified Khater method) on the same model for examining the similarities and differences between these methods.

In 1983, Jimbo and Miwa put the structure of the JM model in the following formula [28]:

υxxxy+3υxyυx+3υyυxx+2υyt3υxz=0, (10)

where υ=υ(x,y,z,t) describes a certain wave in physics. This model is the second equation in the well-known KP hierarchy of integrable systems that are given by [29]

(ut+6uux+uxxx)x+3σ2uyy=0, (11)

where u=u(x,y,t) is a scalar function, x,y,t,σ represent longitudinal, transverse spatial coordinates, time, and arbitrary constant, respectively. However, it does not pass any of the conventional integrability tests. It is shown to be conditionally integrable having two types of solitary wave solutions such that the solitary waves in second type do not interact elastically. Equation (11) has two forms that depend on the values of σ as follows [30,31,32,33,34]:

  • When σ=i,i=1, Equation (11) has been called a KPI equation and was used to describe waves in thin films with high surface tension [35].

  • When σ=1, Equation (11) has been named KPII equation and was used to describe water waves with small surface tension [36].

The rest of the paper is organized as follows: Section 2 applies the above-mentioned techniques to the nonlinear time fractional JM equation to obtain exact and solitary wave solutions. Section 3 sketches some figures (Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Figure 9 and Figure 10) for the solutions and gives the physical interpretation of them. Section 4 gives a full discussion about the similarities and differences between these methods. Section 5 summaries the main conclusions.

Figure 1.

Figure 1

Representation of the solution of Equation (15): (a) three-dimensional ν1(x,t); (b) ν1(x) for several values of t and (c) density plot ν1(x,t).

Figure 2.

Figure 2

Representation of the solution of Equation (27): (a) three-dimensional ν12(x,t); (b) ν12(x) for several values of t and (c) density plot ν12(x,t).

Figure 3.

Figure 3

Representation of the solution of Equation (35): (a) three-dimensional ν18(x,t); (b) ν18(x) for several values of t and (c) density plot ν18(x,t).

Figure 4.

Figure 4

Representation of the solution of Equation (45): (a) three-dimensional ν27(x,t); (b) ν27(x) for several values of t and (c) density plot ν27(x,t).

Figure 5.

Figure 5

Representation of the solution of Equation (52): (a) three-dimensional ν33(x,t); (b) ν33(x) for several values of t and (c) density plot ν33(x,t).

Figure 6.

Figure 6

Representation of the solution of Equation (58): (a) three-dimensional ν38(x,t); (b) ν38(x) for several values of t and (c) density plot ν38(x,t).

Figure 7.

Figure 7

Representation of the solution of Equation (73): (a) three-dimensional ν52(x,t); (b) ν52(x) for several values of t and (c) density plot ν52(x,t).

Figure 8.

Figure 8

Representation of the solution of Equation (101): (a) three-dimensional ν79(x,t); (b) ν79(x) for several values of t and (c) density plot ν79(x,t).

Figure 9.

Figure 9

Representation of the solution of Equation (105): (a) three-dimensional ν82(x,t); (b) ν82(x) for several values of t and (c) density plot ν82(x,t).

Figure 10.

Figure 10

Representation of the solution of Equation (114): (a) three-dimensional ν90(x,t); (b) ν90(x) for several values of t and (c) density plot ν90(x,t).

2. Explicit Wave Solutions of the Nonlinear Time Fractional JM Model

This part tests the performance of ten analytical techniques on the nonlinear time fractional Jimbo–Miwa (JM). This model has a variety of solutions with distinct structures such as single-soliton solutions, multiple-soliton solutions, periodic wave solutions, and traveling wave solutions [37,38,39,40,41,42,43,44]. The fractional mathematical modeling of this equation is given as follows:

νxxxy+pνyνxx+qνxνxy+rDtα1νysνxz=0, (12)

where ν=ν(x,y,z,t) describes the dynamics of a certain (3+1)-dimensional waves in physics and p,q,r,s are arbitrary constants. Transformation the NLFPD equation into the NLPD equation with integer order by using the following conformable fractional derivative [ν(x,t)=ν(Θ),Θ=x+y+z+ctα1α1] yields:

ν+12(p+q)ν2+(rcs)u=0. (13)

Calculating the homogeneous balance value between the highest order derivative and nonlinear terms of Equation (13) gives N=1.

2.1. Utilization of Exp (ϕ(Θ))-Expansion Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=i=0Naieiϕ(Θ)=a1eϕ(Θ)+a0, (14)

where ai,{i=0,1,,N} is arbitrary constant and ϕ(Θ) is the solution function of the next ODE

ϕ(Θ)=λ+μeϕ(Θ)+1eϕ(Θ),

where λ, and μ are arbitrary constants. Handling Equation (13) by utilizing Equation (14) and its derivatives, converts the left-hand side of Equation (13) to a polynomial equation of e(ϕ(Θ)). Gathering all coefficients of term that has the same degree and equating them to zero. Solving the obtained algebraic system of equations leads to

a112p+q,cλ24μsr,wherep+q0,λ24μs,r0.

According to the value of these parameters, we get the relevant traveling wave solutions of Equation (12):

When [λ24μ>0,μ0]:

ν1(x,y,z,t)=a024μ(p+q)(λλ24μtanh(12λ24μ(tα1(λ2+4μ+s)α1r+x+y+z+ϑ))), (15)
ν2(x,y,z,t)=a024μ(p+q)(λλ24μcoth(12λ24μ(tα1(λ2+4μ+s)α1r+x+y+z+ϑ))). (16)

When [λ24μ>0,μ=0]:

ν3(x,y,z,t)=a0+12λ(p+q)(exp(λ(tα1(λ2+s)α1r+x+y+z+ϑ))1). (17)

When [λ24μ=0,μ0,λ0]:

ν4(x,y,z,t)=a06λ2(α1r(x+y+z+ϑ)+stα1)(p+q)(α1r(λ(x+y+z+ϑ)+2)+λstα1). (18)

When [λ24μ=0,μ=0,λ=0]:

ν5(x,y,z,t)=a0+12α1r(p+q)(α1r(x+y+z+ϑ)+stα1). (19)

When [λ24μ<0,μ0]:

ν6(x,y,z,t)=a024μ(p+q)(λ4μλ2tan(124μλ2(tα1(λ2+4μ+s)α1r+x+y+z+ϑ))), (20)
ν7(x,y,z,t)=a024μ(p+q)(λ4μλ2cot(124μλ2(tα1(λ2+4μ+s)α1r+x+y+z+ϑ))). (21)

2.2. Utilization of the Improved F-Expansion Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=i=NNai(μ+ϕ(Θ))i=a1μ+ϕ(Θ)+a1(μ+ϕ(Θ))+a0, (22)

where ai,{i=N,N+1,,N1,N} is arbitrary constant and ϕ(Θ) is the solution of the next ODE

ϕ(Θ)=ϕ(Θ)2+r.

Handling of Equation (13) by utilizing Equation (22) and its derivatives converts the left-hand side of Equation (13) to a polynomial function of ϕ(Θ). Gather all coefficients of terms that have the same degree and equate them to zero. Solving the obtained system of equations yields.

Family I:

a112(μ2+r)p+q,a10,c4r+sr,where4r+s0,r0,p+q=0.

According to the value of these parameters, we get the relevant traveling wave solutions of Equation (12):

When [r<0]:

ν8(x,y,z,t)=a0+12(μ2+r)(p+q)(μ+rtan(r((4r+s)tα1α1r+x+y+z))), (23)
ν9(x,y,z,t)=a0+12(μ2+r)(p+q)(μrcot(r((4r+s)tα1α1r+x+y+z))). (24)

When [r>0]:

ν10(x,y,z,t)=a0+12(μ2+r)(p+q)(μ+rtan(r((4r+s)tα1α1r+x+y+z))), (25)
ν11(x,y,z,t)=a0+12(μ2+r)(p+q)(μrcot(r((4r+s)tα1α1r+x+y+z))). (26)

Family II:

a10,a112p+q,c4r+sr,where4r+s0,r0,p+q=0.

According to the value of these parameters, we get the relevant traveling wave solutions of Equation (12):

When [r<0]:

ν12(x,y,z,t)=a0(p+q)12(μ+rtan(r((4r+s)tα1α1r+x+y+z)))p+q, (27)
ν13(x,y,z,t)=a012(μrcot(r((4r+s)tα1α1r+x+y+z)))p+q. (28)

When [r>0]:

ν14(x,y,z,t)=a012(μ+rtan(r((4r+s)tα1α1r+x+y+z)))p+q, (29)
ν15(x,y,z,t)=a012(μrcot(r((4r+s)tα1α1r+x+y+z)))p+q. (30)

2.3. Utilization of an Extended (GG)-Expansion Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=a0+i=1NaiG(Θ)G(Θ)i+biG(Θ)G(Θ)i1σG(Θ)G(Θ)2μ+1+a0=a1G(Θ)G(Θ)+a0+b1σ(G(Θ)2μG(Θ)2+1), (31)

where ai,bi are arbitrary constants and G(Θ)G(Θ) is the solutions of the next ODE

G(Θ)G(Θ)=μ,

where μ is arbitrary constant. Handling of Equation (13) by utilizing Equation (31) and its derivatives converts the left-hand side of Equation (13) to the polynomial function of (G(Θ)G(Θ))i[σG(Θ)2μG(Θ)2+σ]j, where {i=0,1,,4&j=0,1}. Gather all coefficients of terms that have the same degree and equate them to zero. Solving the obtained system of equation yields

Family I:

a16p+q,b16μp2σ+2pqσ+q2σ,cμ+sr,wherep2σ+2pqσ+q2σ>0,p+q0,r0,
μ>0,μ+s0.

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given by the following formulas:

When [μ>0]:

ν16(x,y,z,t)=a0+6μ(C12+C22)σ(C1sin(μ((μ+s)tα1α1r+x+y+z))+C2cos(μ((μ+s)tα1α1r+x+y+z)))2σ(p+q)2+6μ(C1C2tan(μ((μ+s)tα1α1r+x+y+z)))(p+q)(C1tan(μ((μ+s)tα1α1r+x+y+z))+C2). (32)

When [μ<0]:

ν17(x,y,z,t)=a0+6μ(C12C22)σ(C1cos(μ((μ+s)tα1α1r+x+y+z))+C2sinh(μ((μ+s)tα1α1r+x+y+z)))2σ(p+q)2   +6C2μcos(μ((μ+s)tα1α1r+x+y+z))(p+q)(C1cos(μ((μ+s)tα1α1r+x+y+z))+C2sinh(μ((μ+s)tα1α1r+x+y+z)))   6C1μsin(μ((μ+s)tα1α1r+x+y+z))(p+q)(C1cos(μ((μ+s)tα1α1r+x+y+z))+C2sinh(μ((μ+s)tα1α1r+x+y+z))). (33)

Family II:

a112p+q,b10,c4μ+sr,wherep+q0,r0,4μ+s0.

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given by the following formulas:

When [μ>0]:

ν17(x,y,z,t)=(a0C1(p+q)12C2μ)sin(μ((4μ+s)tα1α1r+x+y+z))(p+q)(C1sin(μ((4μ+s)tα1α1r+x+y+z))+C2cos(μ((4μ+s)tα1α1r+x+y+z)))+(a0C2(p+q)+12C1μ)cos(μ((4μ+s)tα1α1r+x+y+z))(p+q)(C1sin(μ((4μ+s)tα1α1r+x+y+z))+C2cos(μ((4μ+s)tα1α1r+x+y+z))). (34)

When [μ<0]:

ν18(x,y,z,t)=C1(a0(p+q)cos(μ((4μ+s)tα1α1r+x+y+z))12μsin(μ((4μ+s)tα1α1r+x+y+z)))(p+q)(C1cos(μ((4μ+s)tα1α1r+x+y+z))+C2sinh(μ((4μ+s)tα1α1r+x+y+z)))+C2(a0(p+q)sinh(μ((4μ+s)tα1α1r+x+y+z))+12μcos(μ((4μ+s)tα1α1r+x+y+z)))(p+q)(C1cos(μ((4μ+s)tα1α1r+x+y+z))+C2sinh(μ((4μ+s)tα1α1r+x+y+z))). (35)

2.4. Utilization of an Extended Tanh-Function Method

Applying this method enables putting the general solution of Equation (13) into the next formula:

ν(Θ)=i=NNaiϕ(Θ)i=a1ϕ(Θ)+a1ϕ(Θ)+a0, (36)

where ai,{i=N,N+1,,N1,N} and ϕ(Θ) is the solution of the next ODE

ϕ(Θ)=d+ϕ(Θ)2,

where d is arbitrary constants. Handling of Equation (13) by utilizing Equation (36) and its derivatives converts the left-hand side of Equation (13) to polynomial function of ϕ(Θ). Gather all coefficients of terms that have a same degree and equate them to zero. Solving the obtained system of equation results in

Family I:

a112p+q,a112dp+q,c16d+sr,where[p+q0,r0,16d+s0].

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given by the following formulas:

When [d<0]:

ν19(x,y,z,t)=a0+12dtan(d((16d+s)tα1α1r+x+y+z))(cot2(d((16d+s)tα1α1r+x+y+z))1)p+q. (37)

When [d>0]:

ν20(x,y,z,t)=a0+12dtan(d((16d+s)tα1α1r+x+y+z))(cot2(d((16d+s)tα1α1r+x+y+z))1)p+q. (38)

When [d=0]:

ν21(x,y,z,t)=a0+12(p+q)(stα1α1r+x+y+z). (39)

Family II:

a112p+q,a10,c4d+sr,where[p+q0,r0,4d+s0].

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given by the next formulas:

When [d<0]:

ν22(x,y,z,t)=a012dtan(d((16d+s)tα1α1r+x+y+z))p+q, (40)
ν23(x,y,z,t)=a0+12dcot(d((16d+s)tα1α1r+x+y+z))p+q. (41)

When [d>0]:

ν24(x,y,z,t)=a012dtan(d((16d+s)tα1α1r+x+y+z))p+q, (42)
ν25(x,y,z,t)=a0+12dcot(d((16d+s)tα1α1r+x+y+z))p+q. (43)

When [d=0]:

ν26(x,y,z,t)=a0+12(p+q)(stα1α1r+x+y+z). (44)

Family III:

a10,a112dp+q,c4d+sr,where[p+q0,r0,4d+s0,d0].

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given by the following formulas:

When [d<0]:

ν27(x,y,z,t)=a0+12dcot(d((16d+s)tα1α1r+x+y+z))p+q, (45)
ν28(x,y,z,t)=a012dtan(d((16d+s)tα1α1r+x+y+z))p+q. (46)

When [d>0]:

ν29(x,y,z,t)=a0+12dcot(d((16d+s)tα1α1r+x+y+z))p+q, (47)
ν30(x,y,z,t)=a012dtan(d((16d+s)tα1α1r+x+y+z))p+q. (48)

2.5. Utilization of the Simplest Equation Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=i=0Naif(Θ)i=a1f(Θ)+a0, (49)

where ai is arbitrary constant and f(Θ) is the solutions of the next ODE

f(Θ)=c2f(Θ)2+c1f(Θ),

where c1andc2 are arbitrary constants. Handling of Equation (13) by utilizing Equation (49) and its derivatives converts the left-hand side of Equation (13) to polynomial function of f(Θ). Gathering all coefficients of terms that have the same degree and equating them to zero. Solving the obtained system of equation obtains

Family I

a1i2cb,aa02(b),c1i2a0bc,where[b<0,c0].

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given as follows:

When [c21]:

ν31(x,y,z,t)=abicc1(1+tanh(12c1(i2babtα1α1c1+x+y+z+ϑ)))2b, (50)
ν32(x,y,z,t)=ab+icc1(1+tanh(12c1(i2babtα1α1c1+x+y+z+ϑ)))2b. (51)

Family II

a12a0,ci2a0b,aa02(b),where[b<0].

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given as follows:

When [c11,c21]:

ν33(x,y,z,t)=abtanh(12(2ibabtα1α1+x+y+z)). (52)

2.6. Utilization of an Extended Simplest Equation Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=i=NNaif(ξ)i=a1f(Θ)+a1f(Θ)+a0, (53)

where ai,{i=N,N+1,,N1,N} and f(Θ) is the solution of the next ODE

f(Θ)=α+λf(Θ)+μf(Θ)2,

where α,λ,andμ are arbitrary constants. Handling Equation (13) by utilizing Equation (53) and its derivatives converts the left-hand side of Equation (13) to polynomial function of f(Θ). Gather all coefficients of terms that have the same degree and equate them to zero. Solving the obtained system of equation, we get:

Family I

a112μp+q,a10,c4αμ+λ2sr,where[r0,p+q0,μ0,4αμ+λ2s].

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given as follows:

When [λ=0]:

Thus, when [αμ>0], the solutions take the following forms:

ν34(x,y,z,t)=a012αμtan(αμ(tα1(4αμ+s)α1r+x+y+z+ϑ))p+q, (54)
ν35(x,y,z,t)=a012αμcot(αμ(tα1(4αμ+s)α1r+x+y+z+ϑ))p+q. (55)

When [αμ<0]:

ν36(x,y,z,t)=a012α(μ)tanh(α(μ)(tα1(4αμ+s)α1r+x+y+z)log(ϑ)2)p+q, (56)
ν37(x,y,z,t)=a012α(μ)coth(α(μ)(tα1(4αμ+s)α1r+x+y+z)log(ϑ)2)p+q. (57)

When [α=0]:

Thus, when [λ>0], the solutions take the following forms:

ν38(x,y,z,t)=a0+12λ(1μeλ((sλ2)tα1α1r+x+y+z+ϑ)1+1)p+q, (58)
ν39(x,y,z,t)=a0+12μ(11μeλ((sλ2)tα1α1r+x+y+z+ϑ)+1)p+q. (59)

When [4αμ>λ2]: while [μ>0]:

ν40(x,y,z,t)=a0(p+q)+6λ64αμλ2tan(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ))p+q, (60)
ν41(x,y,z,t)=a0(p+q)+6λ64αμλ2cot(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ))p+q. (61)

When [4αμ<λ2]:

Thus, when [μ>0], the solutions take the following forms:

ν42(x,y,z,t)=a0(p+q)6(λ+4αμλ2tan(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ)))p+q, (62)
ν43(x,y,z,t)=a0(p+q)6(λ+4αμλ2cot(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ)))p+q. (63)

Family II

a10,a112αp+q,c4αμ+λ2sr,where[r0,p+q0,α0,4αμ+λ2s].

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given as follows:

When [λ=0]:

While [αμ>0]:

ν44(x,y,z,t)=a0+12αμcot(αμ(tα1(4αμ+s)α1r+x+y+z+ϑ))p+q, (64)
ν45(x,y,z,t)=a0+12αμtan(αμ(tα1(4αμ+s)α1r+x+y+z+ϑ))p+q. (65)

While [αμ<0]:

ν46(x,y,z,t)=a012α(μ)coth(α(μ)(tα1(4αμ+s)α1r+x+y+z)log(ϑ)2)p+q, (66)
ν47(x,y,z,t)=a012α(μ)tanh(α(μ)(tα1(4αμ+s)α1r+x+y+z)log(ϑ)2)p+q. (67)

When [4αμ>λ2]:

Thus, when [μ>0], the solutions take the following forms:

ν48(x,y,z,t)=a024αμ(p+q)(λ4αμλ2tan(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ))), (68)
ν49(x,y,z,t)=a024αμ(p+q)(λ4αμλ2cot(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ))). (69)

When [4αμ<λ2]:

While [μ>0]:

ν50(x,y,z,t)=a0+24αμ(p+q)(λ+4αμλ2tan(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ))), (70)
ν51(x,y,z,t)=a0+24αμ(p+q)(λ+4αμλ2cot(124αμλ2(tα1(4αμλ2+s)α1r+x+y+z+ϑ))). (71)

2.7. Utilization of the Generalized Riccati Expansion Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=i=1NaiQ(Θ)i+i=1NbiQ(Θ)i+a0=a1Q(Θ)+a0+b1Q(Θ), (72)

where a0,ai,bi,{i=0,1,,N} and Q(Θ) is the solution of the next ODE

Q(Θ)=A+BQ(Θ)+mQ(Θ)2,

where A,B,andm are arbitrary constants. Handling of Equation (13) by utilizing Equation (72) converts the left-hand side of Equation (13) to polynomial function of Q(Θ). Gather all coefficients of terms that have the same degree and equate them to zero. Solving the obtained system of equation leads to

b112Ap+q,a10,c4AmB2+sr,where[p+q0,A0,r0,4AmB2+s0].

According to the value of these parameters, we get the relevant traveling wave solutions of Equation (12):

When Δ=(B24mA)>0&mB0&mA0&F2R2>0:

ν52(x,y,z,t)=a024Am(p+q)(Δtanh(12Δ(tα1(4AmB2+s)α1r+x+y+z))+B), (73)
ν53(x,y,z,t)=a024Am(p+q)(Δcoth(12Δ(tα1(4AmB2+s)α1r+x+y+z))+B), (74)
ν54(x,y,z,t)=a024Am(p+q)(B+Δ(tanh(Δ(tα1(4AmB2+s)α1r+x+y+z))±isech(Δ(tα1(4AmB2+s)α1r+x+y+z)))), (75)
ν55(x,y,z,t)=a024Am(p+q)(Δ(coth(Δ(tα1(4AmB2+s)α1r+x+y+z))±csch(Δ(tα1(4AmB2+s)α1r+x+y+z)))+B), (76)
ν56(x,y,z,t)=a048Am(p+q)(Δ(tanh(14Δ(tα1(4AmB2+s)α1r+x+y+z))+coth(14Δ(tα1(4AmB2+s)α1r+x+y+z)))+2B), (77)
ν57(x,y,z,t)=a024Am(p+q)(ΔRcosh(Δ(tα1(4AmB2+s)α1r+x+y+z))Δ(F2+R2)Rsinh(Δ(tα1(4AmB2+s)α1r+x+y+z))+F+B), (78)
ν58(x,y,z,t)=a024Am(p+q)(ΔRsinh(Δ(tα1(4AmB2+s)α1r+x+y+z))+Δ(R2F2)Rcosh(Δ(tα1(4AmB2+s)α1r+x+y+z))+F+B), (79)
ν59(x,y,z,t)=a0(p+q)+6Δtanh(12Δ(tα1(4AmB2+s)α1r+x+y+z))6Fp+q, (80)
ν60(x,y,z,t)=a06(BΔcoth(12Δ(tα1(4AmB2+s)α1r+x+y+z)))p+q, (81)
ν61(x,y,z,t)=6sech(Δ(tα1(4AmB2+s)α1r+x+y+z))p+q×Δsinh(Δ(tα1(4AmB2+s)α1r+x+y+z))(Bcosh(Δ(tα1(4AmB2+s)α1r+x+y+z))±iΔ)+a0, (82)
ν62(x,y,z,t)=a06(Bcsch(Δ(tα1(4AmB2+s)α1r+x+y+z))(Δcosh(Δ(tα1(4AmB2+s)α1r+x+y+z))±Δ))p+q, (83)
ν63(x,y,z,t)=a0(p+q)+3Δtanh(12Δ(tα1(4AmB2+s)α1r+x+y+z))(coth2(12Δ(tα1(4AmB2+s)α1r+x+y+z))+1)6Bp+q. (84)

When Δ=(B24mA)<0&mB0&mA0&F2R2<0:

ν64(x,y,z,t)=a024Am(p+q)(Δtanh(12Δ(tα1(4AmB2+s)α1r+x+y+z))+B), (85)
ν65(x,y,z,t)=a024Am(p+q)(Δcoth(12Δ(tα1(4AmB2+s)α1r+x+y+z))+B), (86)
ν66(x,y,z,t)=a024Am(p+q)(BΔ(tan(Δ(tα1(4AmB2+s)α1r+x+y+z))±sech(Δ(tα1(4AmB2+s)α1r+x+y+z)))), (87)
ν67(x,y,z,t)=a024Am(p+q)(Δ(cot(Δ(tα1(4AmB2+s)α1r+x+y+z))±csc(Δ(tα1(4AmB2+s)α1r+x+y+z)))+B), (88)
ν68(x,y,z,t)=a048Am(p+q)(Δtanh(14Δ(tα1(4AmB2+s)α1r+x+y+z))(coth2(14Δ(tα1(4AmB2+s)α1r+x+y+z))+1)+2B), (89)
ν69(x,y,z,t)=a024Am(p+q)(ΔRcosh(Δ(tα1(4AmB2+s)α1r+x+y+z))Δ(FR)(F+R)Rsin(Δ(tα1(4AmB2+s)α1r+x+y+z))+F+B), (90)
ν70(x,y,z,t)=a024Am(p+q)(Δ(FR)(F+R)ΔRsinh(Δ(tα1(4AmB2+s)α1r+x+y+z))Rcosh(Δ(tα1(4AmB2+s)α1r+x+y+z))+F+B), (91)
ν71(x,y,z,t)=a0(p+q)+6Δtanh(12Δ(tα1(4AmB2+s)α1r+x+y+z))6Bp+q, (92)
ν72(x,y,z,t)=a06(BΔcoth(12Δ(tα1(4AmB2+s)α1r+x+y+z)))p+q, (93)
ν73(x,y,z,t)=6sech(Δ(tα1(4AmB2+s)α1r+x+y+z))p+q×Δsinh(Δ(tα1(4AmB2+s)α1r+x+y+z))(Bcosh(Δ(tα1(4AmB2+s)α1r+x+y+z))±Δ)+a0, (94)
ν74(x,y,z,t)=a06(Bcsc(Δ(tα1(4AmB2+s)α1r+x+y+z))(Δcos(Δ(tα1(4AmB2+s)α1r+x+y+z))±Δ))p+q, (95)
ν75(x,y,z,t)=a0(p+q)+3Δtanh(12Δ(tα1(4AmB2+s)α1r+x+y+z))(coth2(12Δ(tα1(4AmB2+s)α1r+x+y+z))+1)6Bp+q. (96)

2.8. Utilization of the Generalized Sinh–Gordon Expansion Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=i=1Ncoshi1(w(Θ))[Bisinh(w(Θ))+Aicosh(w(Θ))]+A0=A1cosh(w(Θ))+A0+B1sinh(w(Θ)), (97)

where A1,A0,andB1 are arbitrary constants. Handling of Equation (13) by utilizing Equation (97) and its derivatives converts the left-hand side of Equation (13) to polynomial function of f(Θ). Gather all coefficients of terms that have the same degree and equate them to zero. Solving the obtained system of equation leads to

Case I: When [w(Θ)=sinh(w(Θ))]:

Family I:

A16p+q,B16p2+2pq+q2,cs1r,wherep+q0,r0,p2+2pq+q20.

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given in the following formulas:

ν76(x,y,z,t)=A0+6tanh((s1)tα1α1r+x+y+z)p+q6(±i)sech((s1)tα1α1r+x+y+z)(p+q)2, (98)
ν77(x,y,z,t)=A0+6coth((s1)tα1α1r+x+y+z)p+q6(±i)csch((s1)tα1α1r+x+y+z)(p+q)2. (99)

Family II:

A10,B112p+q,c(sr)2,where,p+q0,r0.

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given in the following formulas:

ν78(x,y,z,t)=A0+12tanh((s4)tα1α1r+x+y+z)p+q, (100)
ν79(x,y,z,t)=A0+12coth((s4)tα1α1r+x+y+z)p+q. (101)

Case II: When [w(ξ)=cosh(w(ξ))]:

Family I:

A10,B112p+q,csr,where,p+q0,r0.

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given by the following formulas:

ν80(x,y,z,t)=A012tan(stα1α1r+x+y+z)p+q, (102)
ν81(x,y,z,t)=A0+12cot(s2tα1α1r2+x+y+z)p+q. (103)

2.9. Utilization of Riccati–Bernoulli Sub-ODE Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(ξ)=aν(Θ)2m+bν(Θ)+ην(Θ)m, (104)

where a,b,η,andm are arbitrary constants. Substituting Equation (104) and its derivatives into Equation (13), in addition to collecting all coefficients of the same term of ν(ξ), we get the system of equation. Solving this system leads to

Family I:

a112(pq),bscr,η0,wherescr>0.

Thus, the solitary wave solutions of Equation (12) are given by:

ν82(x,y,z,t)=(μescr(ctα1α1+x+y+z)p+q12scr)r. (105)

Family II:

a112(pq),bscr,η0,wherescr>0.

Thus, the solitary wave solutions of Equation (12) are given by

ν83(x,y,z,t)=(p+q12scr+μescr(ctα1α1+x+y+z))r. (106)

Family III:

a112(pq),b0,c3(sηr)p+q,wherescr>0.

Thus, the solitary wave solutions of Equation (12) are given by

When [m0,a0,b24aη<0]

ν84(x,y,z,t)=(p+q)tan(12crs(ctα1α1+x+y+z+ϑ))6crs, (107)
ν85(x,y,z,t)=(p+q)cot(12crs(ctα1α1+x+y+z+ϑ))6crs. (108)

When [m0,a0,b24aη>0]

ν86(x,y,z,t)=(p+q)coth(12scr(ctα1α1+x+y+z+ϑ))6crs, (109)
ν87(x,y,z,t)=(p+q)tanh(12scr(ctα1α1+x+y+z+ϑ))6crs. (110)

2.10. Utilization of the Modified Auxiliary Method

Applying this method enables putting the general solution of Equation (13) in the next formula:

ν(Θ)=i=1NaiKif(Θ)+i=1NbiKif(Θ)+a0=a1Kf(Θ)+a0+b1Kf(Θ), (111)

where ai,bi are arbitrary constants and f(Θ) is the solution of the next ODE

f(Θ)=β+αKf(Θ)+σKf(Θ)ln(K),

where β,α,andσ are arbitrary constants. Handling of Equation (13) by utilizing Equation (111) and its derivatives converts the left-hand side of Equation (13) to polynomial function of Kf(Θ). Gather all coefficients of terms that have the same degree and equate them to zero. Solving the obtained system of equation yields:

Family I:

a10,b112αp+q,c4ασβ2+sr,wherep+q0,r0,4ασβ2+s0,α0.

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given as follows:

When [β24ασ<0&σ0]:

ν88(x,y,z,t)=a024ασ(p+q)(β4ασβ2tan(124ασβ2(tα1(4ασβ2+s)rα1+x+y+z))), (112)
ν89(x,y,z,t)=a024ασ(p+q)(β4ασβ2cot(124ασβ2(tα1(4ασβ2+s)rα1+x+y+z))). (113)

When [β24ασ>0&σ0]:

ν90(x,y,z,t)=a024ασ(p+q)(β+β24ασtanh(12β24ασ(tα1(4ασβ2+s)rα1+x+y+z))), (114)
ν91(x,y,z,t)=a024ασ(p+q)(β+β24ασcoth(12β24ασ(tα1(4ασβ2+s)rα1+x+y+z))). (115)

When [β2+4α2<0&α=σ&σ0]:

ν92(x,y,z,t)=a0+24α2(p+q)(β4α2β2tan(124α2β2(tα1(4α2β2+s)rα1+x+y+z))), (116)
ν93(x,y,z,t)=a0+24α2(p+q)(β4α2β2cot(124α2β2(tα1(4α2β2+s)rα1+x+y+z))). (117)

When [β2+4α2>0&α=σ&σ0]:

ν94(x,y,z,t)=a0+24α2(p+q)(β+4α2+β2tanh(124α2+β2(tα1(4α2β2+s)rα1+x+y+z))), (118)
ν95(x,y,z,t)=a0+24α2(p+q)(β+4α2+β2coth(124α2+β2(tα1(4α2β2+s)rα1+x+y+z))). (119)

When [β24α2<0&α=σ&σ0]:

ν96(x,y,z,t)=a024α2(p+q)(β4α2β2tan(124α2β2(tα1(4α2β2+s)rα1+x+y+z))), (120)
ν97(x,y,z,t)=a024α2(p+q)(β4α2β2cot(124α2β2(tα1(4α2β2+s)rα1+x+y+z))). (121)

When [β24α2>0&α=σ&σ0]:

ν98(x,y,z,t)=a024α2(p+q)(β+β24α2tanh(12β24α2(tα1(4α2β2+s)rα1+x+y+z))), (122)
ν99(x,y,z,t)=a024α2(p+q)(β+β24α2coth(12β24α2(tα1(4α2β2+s)rα1+x+y+z))). (123)

When [ασ<0&α0&β=0]:

ν100(x,y,z,t)=a0+12ασcot(ασ(tα1(4ασ+s)rα1+x+y+z))p+q, (124)
ν101(x,y,z,t)=a012ασtan(ασ(tα1(4ασ+s)rα1+x+y+z))p+q. (125)

When [ασ>0&α0&β=0]:

ν102(x,y,z,t)=a0+12ασcoth(ασ(tα1(4ασ+s)rα1+x+y+z))p+q, (126)
ν103(x,y,z,t)=a0+12ασtanh(ασ(tα1(4ασ+s)rα1+x+y+z))p+q. (127)

When [β=0&α=σ]:

ν104(x,y,z,t)=a0+12αtanh(α((s4α2)tα1rα1+x+y+z))p+q. (128)

When [β=κ&α=2κ&σ=0]:

ν105(x,y,z,t)=a0+24κ(p+q)(eκ((sκ2)tα1rα1+x+y+z)2). (129)

When [β=σ=0]:

ν106(x,y,z,t)=a0+12rα1(p+q)(rα1(x+y+z)+stα1). (130)

When [β=0&α=σ]:

ν107(x,y,z,t)=a0+12αcot(C+α((4α2+s)tα1rα1+x+y+z))p+q. (131)

When [σ=0]:

ν108(x,y,z,t)=a012αβ(p+q)(αβeβ((sβ2)tα1rα1+x+y+z)). (132)

When [β24ασ=0]:

ν109(x,y,z,t)=a0+24ασ(rα1(x+y+z)+stα1)(p+q)(rα1(2ασ(x+y+z)+2)2sασtα1). (133)

Family II:

a112σp+q,b10,c4ασβ2+sr,whereσ0,p+q0,4ασβ2+s0,r0.

According to the value of these parameters, the relevant traveling wave solutions of Equation (12) are given as follows:

When [β24ασ<0&σ0]:

ν110(x,y,z,t)=a0(p+q)+6β64ασβ2tan(124ασβ2(tα1(4ασβ2+s)rα1+x+y+z))p+q, (134)
ν111(x,y,z,t)=a0(p+q)+6β64ασβ2cot(124ασβ2(tα1(4ασβ2+s)rα1+x+y+z))p+q. (135)

When [β24ασ>0&σ0]:

ν112(x,y,z,t)=a0(p+q)+6(β+β24ασtanh(12β24ασ(tα1(4ασβ2+s)rα1+x+y+z)))p+q, (136)
ν113(x,y,z,t)=a0(p+q)+6(β+β24ασcoth(12β24ασ(tα1(4ασβ2+s)rα1+x+y+z)))p+q. (137)

When [β2+4α2<0&α=σ&σ0]:

ν114(x,y,z,t)=6αβ+αa0(p+q)6α4α2β2tan(124α2β2(tα1(4α2β2+s)rα1+x+y+z))α(p+q), (138)
ν115(x,y,z,t)=6αβ+αa0(p+q)6α4α2β2cot(124α2β2(tα1(4α2β2+s)rα1+x+y+z))α(p+q). (139)

When [β2+4α2>0&α=σ&σ0]:

ν116(x,y,z,t)=αa0(p+q)+6α(β+4α2+β2tanh(124α2+β2(tα1(4α2β2+s)rα1+x+y+z)))α(p+q), (140)
ν117(x,y,z,t)=αa0(p+q)+6α(β+4α2+β2coth(124α2+β2(tα1(4α2β2+s)rα1+x+y+z)))α(p+q). (141)

When [β24α2<0&α=σ&σ0]:

ν118(x,y,z,t)=αa0(p+q)+6α(β4α2β2tan(124α2β2(tα1(4α2β2+s)rα1+x+y+z)))α(p+q), (142)
ν119(x,y,z,t)=αa0(p+q)+6α(β4α2β2cot(124α2β2(tα1(4α2β2+s)rα1+x+y+z)))α(p+q). (143)

When [β24α2>0&α=σ&σ0]:

ν120(x,y,z,t)=αa0(p+q)+6α(β+β24α2tanh(12β24α2(tα1(4α2β2+s)rα1+x+y+z)))α(p+q), (144)
ν121(x,y,z,t)=αa0(p+q)+6α(β+β24α2coth(12β24α2(tα1(4α2β2+s)rα1+x+y+z)))α(p+q). (145)

When [ασ<0&α0&β=0]:

ν122(x,y,z,t)=a012ασtan(ασ(tα1(4ασ+s)rα1+x+y+z))p+q, (146)
ν123(x,y,z,t)=a0+12ασcot(ασ(tα1(4ασ+s)rα1+x+y+z))p+q. (147)

When [ασ>0&α0&β=0]:

ν124(x,y,z,t)=a0+12ασtanh(ασ(tα1(4ασ+s)rα1+x+y+z))p+q, (148)
ν125(x,y,z,t)=a0+12ασcoth(ασ(tα1(4ασ+s)rα1+x+y+z))p+q. (149)

When [β=0&α=σ]:

ν126(x,y,z,t)=a0+12αcoth(α((s4α2)tα1rα1+x+y+z))p+q. (150)

When [β=σ=κ&α=0]:

ν127(x,y,z,t)=a0+12αcoth(α((s4α2)tα1rα1+x+y+z))p+q. (151)

When [α=0]:

ν128(x,y,z,t)=a0+12β(2σeβ((sβ2)tα1rα1+x+y+z)2+1)p+q. (152)

When [β=α=0]:

ν129(x,y,z,t)=a0+12rα1(p+q)(rα1(x+y+z)+stα1). (153)

When [β=0&α=σ]:

ν130(x,y,z,t)=a012αtan(C+α((4α2+s)tα1rα1+x+y+z))p+q. (154)

When [β=4ασ]:

ν131(x,y,z,t)=a0+6(2ασ+2rα1rα1(x+y+z)+stα1)p+q. (155)

3. Physical Interpretation of Solution

This section discusses and interprets some of the obtained solutions under the suitable choice of the parameters values as shown in Table 1. Generally, all of these waves are considered as traveling from right to left.

Table 1.

Physical interpretation of represented solutions where S,A,andW represent shape, amplitude, and wavelength, respectively.

Fig. Nu. S A W Parameters Value
ν1(x,t) Periodic kink 7.4 6 [a0=9,α1=0.5,λ=3,μ=2,p=8,q=7,r=10,s=5,y=1,z=4,ϑ=6]
ν12(x,t) Singular 15 0.5 [r=4,a0=9,α1=0.5,μ=2,p=8,q=7,s=5,y=1,z=10]
ν18(x,t) Singular kink 15 7 [a0=9,α1=0.5,C1=11,C2=12,μ=4,p=8,q=7,r=10,s=5,y=1,z=2]
ν27(x,t) Singular 20 1.9 [a0=9,α1=0.5,d=4,p=8,q=7,r=10,s=5,y=1,z=2]
ν33(x,t) Periodic kink 1.2 0.7 [α1=0.5,a=4,b=2,y=1,z=2]
ν39(x,t) periodic kink 53 7 {α1=0.5,a0=5,b=2,λ=4,μ=1,p=2,q=3,r=3,z=2,ϑ=3}
ν52(x,t) Kink 10 6 [α1=0.5,a0=5,A=2,B=3,Δ=1,m=1,r=3,s=6,y=1,z=2]
ν79(x,t) periodic anti-kink 15 6 [α1=0.5,A0=3,r=1,s=5,y=1,z=2]
ν82(x,t) periodic kink 0.0006 6 [α1=0.5,c=1,μ=5,p=3,q=4,r=2,s=6,y=1,z=2]
ν90(x,t) periodic kink 0.1 6.5 [a0=7,α=1,β=3,c=1,p=3,q=4,r=5,s=6,σ=2,y=1,z=2,α1=0.5]

4. Discussion

This section investigates the relation between all above-mentioned methods with a modified auxiliary equation method (modified Khater method). We show the similarities and differences between them and the result of this discussion is shown in Table 2.

Table 2.

Discussion of the relations between the modified auxiliary equation and above-mentioned methods.

Method Conditions Similar
Exp (ϕ(Θ))-expansion method [f(Θ)=ϕ(Θ),e=K,σ=μ,β=λ,α=1]
Improved F-expansion method [Kf(Θ)=μ+ϕ(Θ),σ=1,β=2μ,α=μ2+r]
Extended (GG)-expansion method [Kf(Θ)=G(Θ)G(Θ),σ=μ,β=0,α=1]
Extended tanh- function method [Kf(Θ)=ϕ(Θ),σ=1,β=0,α=d]
Simplest equation method [Kf(Θ)=f*(Θ),σ=c2,β=c1,α=0]
Extended simplest equation method [Kf(Θ)=f*(Θ),σ=μ,β=λ,α=α*]
Generalized Riccati expansion method [Kf(Θ)=ϕ(Θ),σ=m,β=B,α=A]
Generalized Sinh–Gordon expansion method [] x
Riccati–Bernoulli Sub-ODE method [] x

According to this discussion, we can conclude that the modified auxiliary equation method (modfied Khater method) covers the first seven methods that are used in this research and it is more general than them.

5. Conclusions

This paper studied the performance of conformable fractional derivative on the time fractional Jimbo–Miwa equation. Moreover, nine analytical and modified auxiliary equation methods (modified Khater method) were applied to this model for getting various explicit wave solutions of the fractional JM model. The solutions obtained were discussed and represented under the suitable choice of the parameters to show the physical properties of each one of them. In addition, we studied each one of the used methods and its relation with the modified auxiliary equation method. Our discussion shows the superiority of the modified auxiliary equation method (modified Khater method) on some of these methods such that it covers almost all solutions that are obtained by these methods.

Acknowledgments

(Corresponding author: Mostafa M. A. Khater) I would like to dedicate this article to my mother, the soul of my father, my wife, and my son (Adam).

Author Contributions

M.M.A.K., D.L., and R.A.M.A. contributed to the design and implementation of the research, to the analysis of the results, and to the writing of the manuscript.

Funding

We did not receive any specific grant from any funding agency.

Conflicts of Interest

The authors declare no conflict of interest.

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