Home Online Manual
Top
Back: grzero
Forward: grsum
FastBack: gitfan_lib
FastForward: hess_lib
Up: gradedModules_lib
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

D.15.10.7 grtwist

Procedure from library gradedModules.lib (see gradedModules_lib).

Usage:
grtwist(a,d), int a, d

Return:
graded object representing S(d)^a

Purpose:
compute presentation of S(d)^a

Example:
 
LIB "gradedModules.lib";
ring r=32003,(x,y,z),dp;
grview(grpower( grshift(grzero(), 10), 5 ) );
==>          1    2    3    4    5      
==>       -------------------------     
==>  -10 :   .    .    .    .    . |   1
==>  -10 :   .    .    .    .    . |   2
==>  -10 :   .    .    .    .    . |   3
==>  -10 :   .    .    .    .    . |   4
==>  -10 :   .    .    .    .    . |   5
==>       =========================     
==>        -10  -10  -10  -10  -10      
grview( grtwist (5, 10) );
==>          1    2    3    4    5      
==>       -------------------------     
==>  -10 :   .    .    .    .    . |   1
==>  -10 :   .    .    .    .    . |   2
==>  -10 :   .    .    .    .    . |   3
==>  -10 :   .    .    .    .    . |   4
==>  -10 :   .    .    .    .    . |   5
==>       =========================     
==>        -10  -10  -10  -10  -10