Top
Back: Tjurina
Forward: T_1
FastBack:
FastForward:
Up: sing_lib
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

D.6.20.15 tjurina

Procedure from library sing.lib (see sing_lib).

Usage:
tjurina(id); id=ideal or poly

Assume:
id=ICIS (isolated complete intersection singularity)

Return:
int = Tjurina number of id

Note:
Tjurina number = -1 implies that id is not an ICIS

Example:
 
LIB "sing.lib";
ring r=32003,(x,y,z),(c,ds);
ideal j=x2+y2+z2,x2+2y2+3z2;
tjurina(j);
==> 5


Top Back: Tjurina Forward: T_1 FastBack: FastForward: Up: sing_lib Top: Singular Manual Contents: Table of Contents Index: Index About: About this document
            User manual for Singular version 4.3.2, 2023, generated by texi2html.