Home Online Manual
Top
Back: resolution
Forward: resolution expressions
FastBack: proc
FastForward: ring
Up: resolution
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

4.18.1 resolution declarations

Syntax:
resolution name = resolution_expression ;

Purpose:
defines a resolution.

Default:
none

Example:
 
  ring R;
  ideal i=z2,x;
  resolution re=res(i,0);
  re;
==>  1      2      1      
==> R <--  R <--  R
==> 
==> 0      1      2      
==> 
  betti(re);
==> 1,1,0,
==> 0,1,1 
  list l = re;
  l;
==> [1]:
==>    _[1]=x
==>    _[2]=z2
==> [2]:
==>    _[1]=-z2*gen(1)+x*gen(2)
==> [3]:
==>    _[1]=0