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D.15.3.33 toddE
Procedure from library chern.lib (see chern_lib).
- Usage:
- toddE(l); l a list of polynomials
- Return:
- polynomial
- Purpose:
- computes the highest relevant term of the Todd class
- Note:
- returns an empty list if l is empty,
very inefficient because the elimination is used, included for comparison with todd(c)
Example:
| | LIB "chern.lib";
// first 3 terms of the Todd class in terms of the Chern classes c(1), c(2), c(3)
ring r=0, (c(1..3)), dp;
list l;
//first term
l=c(1);
print( toddE( l ) );
==> 1/2*c(1)
// second term
l=c(1..2);
print( toddE( l ) );
==> 1/12*c(1)^2+1/12*c(2)
// third term
l=c(1..3);
print( toddE( l ) );
==> 1/24*c(1)*c(2)
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