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 - truncate
Author Message
hannes
  Post subject:  Re: truncate  Reply with quote
Yes, jet provides this functionality:
ring r = real,(x,y,z),dp;
map f=r,x3+x2+x3y+4;
jet(ideal(f),2);
-> _[1]=x2+4.000e+00
and to a map again:
map ff=r,jet(ideal(f),2);
Post Posted: Tue Oct 16, 2007 8:11 pm
riccardo
  Post subject:  truncate  Reply with quote
Given a map, is it possible to extract a map with only low order terms?

If I have:
ring r = real,(x,y,z),dp;
map f=r,x3+x2+x3y+4;

I want to get for instance
x2+4

Thanks,
Riccardo
Post Posted: Mon Oct 08, 2007 3:27 pm


It is currently Fri May 13, 2022 10:59 am
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group