Notation	Meaning
$H_i(x)$	Non-degenerate distribution function
$F_u(x)$	Distribution function
$x_{ij}$	Test index value
$x_i$	The actual value of function
$\mu$	Location parameter
$\mathsf{\sigma }$	Scale parameter
$\mathsf{\xi }$	Shape parameter
${\phi }_i$	Autoregressive coefficients
$e_t$	Error term
$w$	Order of the autoregressive model
${\theta }_i$	Moving average coefficients
$v$	Order of the autoregressive model
$u$	Threshold value
$f_u(x)$	Probability density function
$a_{ij}$	Standardized value
$y_i$	Estimated value of fitting
p	Autoregressive order
d	Non-seasonal difference order
q	Moving average order
P	Seasonal autoregressive order
D	Seasonal difference order
Q	Seasonal moving average order
s	Period
B	Backward shift operator