Back to Forum | View unanswered posts | View active topics





Post a reply
Username:
Note:If not registered, provide any username. For more comfort, register here.
Subject:
Message body:
Enter your message here, it may contain no more than 60000 characters. 

Smilies
:D :) :( :o :shock: :? 8) :lol: :x :P :oops: :cry: :evil: :twisted: :roll: :wink: :!: :?: :idea: :arrow: :| :mrgreen:
Font size:
Font colour
Options:
BBCode is ON
[img] is ON
[flash] is OFF
[url] is ON
Smilies are ON
Disable BBCode
Disable smilies
Do not automatically parse URLs
Confirmation of post
To prevent automated posts the board requires you to enter a confirmation code. The code is displayed in the image you should see below. If you are visually impaired or cannot otherwise read this code please contact the %sBoard Administrator%s.
Confirmation code:
Enter the code exactly as it appears. All letters are case insensitive, there is no zero.
   

Topic review - ... is no standard basis but I'm sure it is
Author Message
levandov
  Post subject:  Re: ... is no standard basis but I'm sure it is  Reply with quote
Hi, Stefan,
Quote:
> Hi,
>
> I've got a few mononomial in a list (actually it's a
> list(list())) and I'm checking if another polynomial is
> dividable by one of them. Right now im using reduce, but
> Singular complains that "_ is no standardbasis", but I'm
> shure it is, because it's a monomial.


Assume you have the ideal I= <xy^2, x^2y> in the ring K[x,y].

When you compute I=std(I), the attribute "IsSB" of the ideal I will be set to 1. (You can check it executing "attrib(I);")

Otherwise, even is it is a standard basis, you will get such warning.

The right solution would be to gather monomials you need in the ideal, compute its standard basis and then perform reductions.

Quote:
> Any workaround/other way to check dividability.

Depending on what you need, you can use functions "simplify", division "/" or "coef". Please consult the Singular manual for details.
Quote:
>
> Regards


Have fun,
Post Posted: Thu Aug 11, 2005 8:48 pm
Stefan Wolf
  Post subject:  ... is no standard basis but I'm sure it is  Reply with quote
Hi,

I've got a few mononomial in a list (actually it's a list(list())) and I'm checking if another polynomial is dividable by one of them. Right now im using reduce, but Singular complains that "_ is no standardbasis", but I'm shure it is, because it's a monomial. Any workaround/other way to check dividability.

Regards

email: glowwormy@web.de
Posted in old Singular Forum on: 2004-03-23 10:36:38+01
Post Posted: Thu Aug 11, 2005 5:32 pm


It is currently Fri May 13, 2022 10:57 am
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group