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

D.5.2.38 tdTerms

Procedure from library chern.lib (see chern_lib).

Usage:
tdTerms(n, f); n integer, f polynomial

Return:
list of polynomials

Purpose:
computes the terms of the Todd class of the line bundle with the Chern root f

Note:

Example:
 
LIB "chern.lib";
ring r=0, (t), ls;;
// the terms of the Todd class of a line bundle with Chern root t up to degree 4
print( tdTerms(4, t) );
==> [1]:
==>    1
==> [2]:
==>    1/2t
==> [3]:
==>    1/12t2
==> [4]:
==>    0
==> [5]:
==>    -1/720t4