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D.15.2.4 segre
Procedure from library chern.lib (see chern_lib).
- Usage:
- segre(c[, N]); c list of polynomials, N integer
- Return:
- list of polynomials
- Purpose:
- computes the list of the Segre classes up to degree N
in terms of the Chern classes from c
- Note:
Example:
| | LIB "chern.lib";
ring r = 0, (c(1..3)), dp;
list l=c(1..3);
//Segre classes up to degree 5 in Chern classes c(1), c(2), c(3)
print( segre(l, 5) );
==> [1]:
==> -c(1)
==> [2]:
==> c(1)^2-c(2)
==> [3]:
==> -c(1)^3+2*c(1)*c(2)-c(3)
==> [4]:
==> c(1)^4-3*c(1)^2*c(2)+c(2)^2+2*c(1)*c(3)
==> [5]:
==> -c(1)^5+4*c(1)^3*c(2)-3*c(1)*c(2)^2-3*c(1)^2*c(3)+2*c(2)*c(3)
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