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D.4.3 homolog_lib
- Library:
- homolog.lib
- Purpose:
- Procedures for Homological Algebra
- Authors:
- Gert-Martin Greuel, greuel@mathematik.uni-kl.de,
Bernd Martin, martin@math.tu-cottbus.de
Procedures:
D.4.3.1 cup | | cup: Ext^1(M',M') x Ext^1() --> Ext^2() |
D.4.3.2 cupproduct | | cup: Ext^p(M',N') x Ext^q(N',P') --> Ext^p+q(M',P') |
D.4.3.3 Ext_R | | Ext^k(M',R), M module, R basering, M'=coker(M) |
D.4.3.4 Ext | | Ext^k(M',N'), M,N modules, M'=coker(M), N'=coker(N) |
D.4.3.5 Hom | | Hom(M',N'), M,N modules, M'=coker(M), N'=coker(N) |
D.4.3.6 homology | | ker(B)/im(A), homology of complex R^k--A->M'--B->N' |
D.4.3.7 kernel | | ker(M'--A->N') M,N modules, A matrix |
D.4.3.8 kohom | | Hom(R^k,A), A matrix over basering R |
D.4.3.9 kontrahom | | Hom(A,R^k), A matrix over basering R |
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