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Vincent Huber vincent.huber at cemosis.fr VH> Is there a *Ginac* way to compute the erf() function ?

At present, I do not see any other ways but: 1. Use some external library (GSL?) to evaluate numerical values of the function. 2. Write user-defined function if any symbolic properties are required. -- Vladimir V. Kisil http://www.maths.leeds.ac.uk/~kisilv/ Book: Geometry of Mobius Transformations http://goo.gl/EaG2Vu Software: Geometry of cycles http://moebinv.sourceforge.net/