|  |  7.5.15 nchomolog_lib Status: experimental
Library:
nchomolog.lib
Purpose:
   Procedures for Noncommutative Homological Algebra
Authors:
Viktor Levandovskyy levandov@math.rwth-aachen.de,
Christian Schilli, christian.schilli@rwth-aachen.de,
 Gerhard Pfister, pfister@mathematik.uni-kl.de
 
Overview:
In this library we present tools of homological algebra for
finitely presented modules over GR-algebras.
 
Procedures:
  
| 7.5.15.0. ncExt_R |  | computes presentation of Ext^k(M',R), M module, R basering, M'=coker(M) |  | 7.5.15.0. ncHom |  | computes presentation of Hom(M',N'), M,N modules, M'=coker(M), N'=coker(N) |  | 7.5.15.0. coHom |  | computes presentation of Hom(R^k,A), A matrix over basering R |  | 7.5.15.0. contraHom |  | computes presentation of Hom(A,R^k), A matrix over basering R |  | 7.5.15.0. dmodoublext |  | computes presentation of Ext_D^i(Ext_D^i(M,D),D), where D is a basering |  | 7.5.15.0. is_cenBimodule |  | checks whether a module presented by M is Artin-centralizing |  | 7.5.15.0. is_cenSubbimodule |  | checks whether a subbimodule M is Artin-centralizing | 
 
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