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D.5.2.34 todd
Procedure from library chern.lib (see chern_lib).
- Usage:
- todd(l [, n] ); l a list of polynomials, n integer
- Return:
- list of polynomials
- Purpose:
- computes [the first n] terms of the Todd class
- Note:
- returns an empty list if l is empty
Example:
| | LIB "chern.lib";
// the terms of the Todd class up to degree 5
// in terms of the Chern classes c(1), c(2), c(3), c(4), c(5)
ring r=0, (c(1..5)), dp;
list l=c(1..5);
print( todd( l ) );
// in the same situation compute only first two terms
print( todd(l, 2) );
// compute the first 5 terms corresponding to the Chern classes c(1), c(2)
l=c(1..2);
print( todd(l, 5) );
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