This is a list of systems and their support for the hyperbolic trigonometric functions.
Also included is the result for (atanh 1), with an exact 1. For
every implementation that supports hyperbolic trigonometric functions,
the value of (atanh 1.0), with inexact 1.0 is +inf.0.
| System | support | (atanh 1) |
|---|---|---|
| Bigloo | n | |
| Biwa | n | |
| Chez | y | error |
| Chibi | n | |
| Chicken | lib | +inf.0 |
| Cyclone | n | |
| Gambit | y | error |
| Gauche | y | +inf.0 |
| Guile | y | +inf.0 |
| Kawa | y | +inf.0 |
| LIPS | n | |
| Loko | n | |
| MIT | n | |
| Racket | y | +inf.0 |
| Sagittarius | n | |
| SCM | y | +inf.0 |
| STklos | y | error |
| Unsyntax | n | |
| Ypsilon | n |
These functions are part of the Common Lisp standard, but not all implementations work the same, as can be seen below. For Common Lisp, the result is always the same for integer 1 and float 1.0.
| System | (atanh 1) |
|---|---|
| ABCL | #.SINGLE-FLOAT-POSITIVE-INFINITY |
| CCL | division by zero |
| Clisp | division by zero |
| ECL | division by zero |
| GCL | division by zero |
| SBCL | division by zero |