Opened 8 years ago

Last modified 8 years ago

#675 new bug

bug in reszeta

Reported by: kroeker@… Owned by: anne
Priority: minor Milestone: 4-1-0 and higher
Component: singular-libs Version: 4-0-1
Keywords: reszeta infinity point euler characteristic bug Cc:

Description

observed by Tobias Rossmann:

 LIB "reszeta.lib";
  ring R=0,(x,y,z),dp;
  short=0;
  def f = x*y;
  list re = resolve(f, "A");
  zetaDL(re, 1);
  f = x*y*z;
  re = resolve(f,"A");
  zetaDL(re, 1);

output

>   ring R=0,(x,y,z),dp;
>   short=0;
>   def f = x*y;
>   list re = resolve(f, "A");
>   zetaDL(re, 1);
[1]
   2/(s2+2s+1)     ///  expected 1/(s2+2s+1) 
>   f = x*y*z;
>   re = resolve(f,"A");
>   zetaDL(re, 1);
[1]
   (3s+4)/(s3+3s2+3s+1) ///  expected 1/(s3+3s2+3s+1)

comment by Anne: "in some cases points at infinity are not correctly considered when computing Euler characteristic in reszeta()"

see also https://github.com/jakobkroeker/test_singular/issues/76

Change History (1)

comment:1 Changed 8 years ago by barakat

Owner: changed from somebody to anne
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