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NonminimalComplexes -- support for computing homology, ranks and SVD complexes, from a chain complex over the real numbers


Some functionality here should be moved elsewhere.


This package will be removed soon, with constantStrand functionality moved elsewhere. The undocumented features the rest of the package relied on have been removed in M2 version 1.23.



This documentation describes version 0.2 of NonminimalComplexes.

Source code

The source code from which this documentation is derived is in the file NonminimalComplexes.m2.


  • Types
    • SparseMatrix (missing documentation)
  • Functions and commands
    • constantStrand -- a constant strand of a chain complex
    • newSparseMatrix (missing documentation)
    • sparseMatrix (missing documentation)
  • Methods
    • constantStrand(ChainComplex,ZZ) -- see constantStrand -- a constant strand of a chain complex
  • Symbols
    • ColumnNums (missing documentation)
    • Entries (missing documentation)
    • RowNums (missing documentation)

For the programmer

The object NonminimalComplexes is a package.