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Re: polynomialreduce

• To: mathgroup at smc.vnet.net
• Subject: [mg57442] Re: [mg57412] polynomialreduce
• From: Daniel Lichtblau <danl at wolfram.com>
• Date: Sat, 28 May 2005 05:39:05 -0400 (EDT)
• References: <200505270856.EAA07645@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

M Sklenar wrote:
> In[1]:=r = PolynomialReduce[p = -(-1 + y) y + z, g = {2 + 4 y, 
> 3/4 - z}, {y, z}]
> 
> 
> Out[1]={{3/8 - y/4, -1/4}, 0}
> 
> 
> In[2]:=Expand[First[r].g + Last[r] - p]
> 
> 
> Out[2]=9/16 - (3*z)/4
> 
> // this should be zero?
> 
> 
> 
> Thank you! M. Sklenar
> 
> PS In[3]:=$Version
> Out[3]=5.0 for Microsoft Windows (June 11, 2003)


It appears to be a very old bug. I'm surprised it stayed around so long. 
Anyway, it's mine and I'll get it fixed.

Daniel Lichtblau
Wolfram Research

• References:
  • polynomialreduce
    • From: "M Sklenar" <msklenar@seznam.cz>