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Kevin Ryde on Wed, 21 Jan 2015 23:20:00 +0100
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Re: polynomial partial fractions
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- To: pari-users@pari.math.u-bordeaux.fr
- Subject: Re: polynomial partial fractions
- From: Kevin Ryde <user42_kevin@yahoo.com.au>
- Date: Thu, 22 Jan 2015 09:18:35 +1100
- Delivery-date: Wed, 21 Jan 2015 23:20:00 +0100
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- References: <87oarafuxi.fsf@blah.blah> <20141211094419.GB7418@math.u-bordeaux1.fr> <878ui7x5j6.fsf@blah.blah> <20141216145632.GB13201@math.u-bordeaux1.fr> <87fvcbxkcv.fsf@blah.blah>
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I got to these few lines. Limited to exact coefficients due to an
add-back self test but maybe that could be loosened if there would be a
use for inexact fracs.
http://user42.tuxfamily.org/pari-pol-pfrac/index.html
When using it with some generating functions I had the urge to print
polynomials with powers ascending and the denominator starting 1 (and
fractions elsewhere as necessary). Eg.
print( (8*x + 3)/(-48*x^2 + 24) )
=>
(1/8 + 1/3*x)/(1 - 2*x^2)
I tried some rough bits for this, but does an option already exist and
is hiding?