Table 2.

Comparison on values of f″(0) with the results of Khan and Pop [12] and Ullah and Zaman [23] (when Pr = 0.73, Nb = 0.0001, Le = 0.1, Bi₁ → ∞, Bi₂ → ∞, n = δ = A = Da = M = Rd = Gr = Gc = S = Ω = Q = Ec = 0) against some values of m.

m	Khan & Pop (2013)	Ullah & Zaman(2017)	Present study
	f″(0)	f″(0)	f″(0)	−θ′(0)	−φ′(0)
0	0.4696	0.4696	0.4688	0.4228	0.2326
1/23	-	0.5690	0.5693	0.4598	0.2348
1/11	0.6550	0.6550	0.6554	0.4818	0.2453
1/7	-	0.7320	0.7322	0.5090	0.2516
1/5	0.8021	0.8021	0.8023	0.5402	0.2669
1/3	0.9277	0.9277	0.9277	0.5904	0.2699
1/2	1.0389	-	1.0389	0.6369	0.2822
1	1.2326	1.2326	1.2326	0.7202	0.3063
5	-	1.5504	1.5503	0.8648	0.3517
100	-	1.6794	1.6794	0.9252	0.3726
∞	-	1.6872	1.6872	0.9289	0.3734