
The 'hyperbolic sine' of a sphere [Le 'sinus hyperbolique' d'une sphère].
                    
                    O --> O' = sinh(O)
|  exponential |  cosine |  sine |  tangent |  hyperbolic cosine |  hyperbolic sine |  hyperbolic tangent | 
|  exponential |  cosine |  sine |  tangent |  hyperbolic cosine |  hyperbolic sine |  hyperbolic tangent | 
