February 2016 - GiNaC-list

Release 1.6.7
by Richard B. Kreckel 29 Feb '16

29 Feb '16

Hi, A new GiNaC release is out and available. It fixes two elusive bugs in sqrfree() and normal(), which indirectly also affect numer() and denom(). Happy hacking -richy. -- Richard B. Kreckel <http://in.terlu.de/~kreckel/>

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Re: [GiNaC-list] erf()
by Vladimir V. Kisil 26 Feb '16

26 Feb '16

>> 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/

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erf()
by Vincent Huber 24 Feb '16

24 Feb '16

Dear members, Is there a *Ginac* way to compute the erf() function ? All the best, VH -- Docteur Ingénieur de recherche CeMoSiS <http://www.cemosis.fr> - vincent.huber(a)cemosis.fr Tel: +33 (0)3 68 8*5 02 06* IRMA - 7, rue René Descartes 67 000 Strasbourg

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Possible bug in sqrfree
by Diego Conti 03 Feb '16

03 Feb '16

Hi, if I understand correctly, the preconditions of sqrfree do not require the operand to be in expanded form. However, invoking it on some non-expanded polynomials results in a division-by-zero error on my system (code attached). Is this a bug in sqrfree? I am using gcc 5.1.1 and GiNaC 1.6.6. Diego

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