Top
Back: displayMultsequence
Forward: stripHNE
FastBack: gaussman_lib
FastForward: mondromy_lib
Up: hnoether_lib
Top: Singular 2-0-4 Manual
Contents: Table of Contents
Index: Index
About: About this document

D.5.5.11 intersection

Procedure from library hnoether.lib (see hnoether_lib).

Usage:
intersection(hne1,hne2); hne1, hne2 lists

Assume:
hne1, hne2 represent a HNE (i.e., are the output of develop(f), or of extdevelop(develop(f),n), or one entry of the list hne in the ring created by hnexpansion(f[,"ess"])).

Return:
int, the intersection multiplicity of the branches corresponding to hne1 and hne2.

Example:
 
LIB "hnoether.lib";
// ------ the example starts here -------
ring r=0,(x,y),dp;
list hn=hnexpansion((x2-y3)*(x2+y3));
def HNEring=hn[1];
setring HNEring;
intersection(hne[1],hne[2]);
==> 6
See also: displayInvariants; hnexpansion.


Top Back: displayMultsequence Forward: stripHNE FastBack: gaussman_lib FastForward: mondromy_lib Up: hnoether_lib Top: Singular 2-0-4 Manual Contents: Table of Contents Index: Index About: About this document
            User manual for Singular version 2-0-4, May 2003, generated by texi2html.