Name:
atanh
the hyperbolic arctangent function.
Library names:
sollya_obj_t sollya_lib_atanh(sollya_obj_t)
sollya_obj_t sollya_lib_build_function_atanh(sollya_obj_t)
#define SOLLYA_ATANH(x) sollya_lib_build_function_atanh(x)
Description:
- atanh is the inverse of the function tanh: atanh(y) is the unique number
x in [-Inf; +Inf] such that tanh(x)=y.
- It is defined only for y in [-1; 1].
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