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Topic review - SOLVE in ideal 1-dimensional
Author Message
  Post subject:  Re: SOLVE in ideal 1-dimensional  Reply with quote
HELlo

thanks, this really solved my problem



gorzel wrote:
And did you try what I proposed?

Actually, I think your ring definition was

Code:
ring R = complex,(x(1..2)),dp;

Now define
Code:
ring Rnew = complex,(x(1)),dp;
ideal s = imap(R,s);
// ideal s= x(1)^2+(5.072659+i*1.481763)*x(1)-75;
solve(s);  // from solve.lib
Post Posted: Mon Apr 05, 2010 4:32 pm
  Post subject:  Re: SOLVE in ideal 1-dimensional  Reply with quote
And did you try what I proposed?

Actually, I think your ring definition was

Code:
ring R = complex,(x(1..2)),dp;

Now define
Code:
ring Rnew = complex,(x(1)),dp;
ideal s = imap(R,s);
// ideal s= x(1)^2+(5.072659+i*1.481763)*x(1)-75;
solve(s);  // from solve.lib
Post Posted: Mon Mar 29, 2010 11:43 pm
  Post subject:  Re: SOLVE in ideal 1-dimensional  Reply with quote
> basering;
// characteristic : 0 (complex:6 digits, additional 6 digits)
// 1 parameter : i
// minpoly : (i^2+1)
// number of vars : 2
// block 1 : ordering lp
// : names x(1) x(2)
// block 2 : ordering C
Post Posted: Mon Mar 29, 2010 7:36 pm
  Post subject:  Re: SOLVE in ideal 1-dimensional  Reply with quote
Your ideal is definitely zero-dimensional.

Tell us, how does your basering looks like?

I suppose that you defined a ring with several variables.

Singular computes the dimension with respect to the
ambiant ring you are working in and not with respect to
the number of variables that occur in the ideal.

So define a new ring only in the variable x(1) and fetch the
ideal s to this ring.Then call solve again. This should then work.
Post Posted: Mon Mar 29, 2010 7:24 pm
  Post subject:  SOLVE in ideal 1-dimensional  Reply with quote
hello friends

i need to compute solutions of a ideal that dont are 0-dimensional
in the examples, its uses the function std.
but in my case
even after using the command, the dimension of the ideal remains the same
and must reduce it to 0 to use the function solve, or need one that returns a solution to an ideal that is not 0-dimensional

ideal s= x(1)^2+(5.072659+i*1.481763)*x(1)-75;
when i use std(s), its return the same s.

i need that dim(s) be a 0
or solve s with other funcion
Post Posted: Mon Mar 29, 2010 4:40 pm


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