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D.5.2.14 chSum
Procedure from librarychern.lib (see chern_lib).
- Usage:
- chSum(c, C); c, C lists of polynomials
- Return:
- list of polynomials
- Purpose:
- computes the Chern classes of a direct sum of two vector bundles
- Note:
LIB "chern.lib"; ring r = 0, (c(1..3), C(1..2)), dp; // Let E be a vector bundle with Chern classes c(1), c(2), c(3). // Let F be a vector bundle with Chern classes C(1), C(2). list l=c(1..3); list L=C(1..2); // Then the Chern classes of their direct sum are print( chSum(l, L) ); |