Home Online Manual
Top
Back: chDual
Forward: chProd
FastBack:
FastForward:
Up: chern_lib
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

D.5.2.17 ChernRootsProd

Procedure from library chern.lib (see chern_lib).

Usage:
ChernRootsProd(a, b); a, b lists of polynomials

Return:
list of polynomials

Purpose:
computes the Chern roots of the tensor product of a vector bundle with Chern roots a and a vector bundles with Chern roots b

Note:

Example:
 
LIB "chern.lib";
ring r=0, (a(1..2), b(1..3)), dp;
list l=a(1..2);
list L=b(1..3);
// Chern roots of the tensor product of a vector bundle with Chern roots a(1), a(2)
// and a vector bundle with Chern roots b(1), b(2), b(3)
print(ChernRootsProd(l, L));
==> [1]:
==>    a(1)+b(1)
==> [2]:
==>    a(1)+b(2)
==> [3]:
==>    a(1)+b(3)
==> [4]:
==>    a(2)+b(1)
==> [5]:
==>    a(2)+b(2)
==> [6]:
==>    a(2)+b(3)