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ChainComplex ++ ChainComplex -- direct sum

Description

C++D -- direct sum of chain complexes and maps
i1 : C = resolution cokernel matrix {{4,5}}

       1       1
o1 = ZZ  <-- ZZ
              
     0       1

o1 : ChainComplex
i2 : C ++ C[-2]

       1       1       1       1
o2 = ZZ  <-- ZZ  <-- ZZ  <-- ZZ
                              
     0       1       2       3

o2 : ChainComplex

Ways to use this method:


The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/OldChainComplexes/docs/doc9.m2:316:0.