ParaMonte Fortran 2.0.0
Parallel Monte Carlo and Machine Learning Library
See the latest version documentation.
pm_math1mexp Module Reference

This module contains procedures and generic interfaces for computing 1 - exp(x) more precisely for tiny x. More...

Data Types

interface  get1mexp
 Generate and return the expression 1 - exp(x) robustly (without numerical underflow). More...


character(*, SK), parameter MODULE_NAME = "@pm_math1mexp"

Detailed Description

This module contains procedures and generic interfaces for computing 1 - exp(x) more precisely for tiny x.

This module is particularly useful for computing 1 - exp(x) when x is near or smaller than the computer precision of the desired real kind.
This precision is the value returned by the Fortran intrinsic epsilon() procedure.

See also
Beebe, 2002, Computation of expm1(x) = exp(x) − 1

Final Remarks

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Amir Shahmoradi, Thursday 1:45 AM, August 22, 2019, Dallas, TX

Variable Documentation


character(*, SK), parameter pm_math1mexp::MODULE_NAME = "@pm_math1mexp"

Definition at line 49 of file pm_math1mexp.F90.