Karim Belabas on Wed, 14 Feb 2018 09:05:22 +0100 |
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Re: polrecip for a constant polymomial |
Fixed in 'master'. Thanks for the report ! Cheers, K.B. * Dirk Laurie [2018-02-14 05:43]: > It is not merely inconvenient, it is inconsistent and may even qualify > as being a bug. > > Surely the definition of polrecip should be equivalent to > > polrecip(p) = subst(p,x,1/x)*x^poldegree(p) > > 2018-02-14 0:41 GMT+02:00 Jacques Gélinas <jacquesg00@hotmail.com>: > > It is inconvenient to have to add code to handle constant polynomials. > > Why not return the constant itself ? > > > > # polrecip(2+0*x) > > %1 = 2 > > # polrecip(2) > > *** at top-level: polrecip(2) > > *** ^----------- > > *** polrecip: incorrect type in polrecip (t_INT). > > > > Jacques Gélinas, Ottawa -- Karim Belabas, IMB (UMR 5251) Tel: (+33) (0)5 40 00 26 17 Universite de Bordeaux Fax: (+33) (0)5 40 00 21 23 351, cours de la Liberation http://www.math.u-bordeaux.fr/~kbelabas/ F-33405 Talence (France) http://pari.math.u-bordeaux.fr/ [PARI/GP] `