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Complexes :: Working with Ext

Working with Ext -- information about functorial properties

Hom and Ext

Yoneda extensions and elements of Ext

  • yonedaMap(Matrix) -- creates a chain complex map representing an extension of modules
  • yonedaMap'(ComplexMap) -- identifies the element of Ext corresponding to a map of free resolutions
  • yonedaExtension(Matrix) -- creates a chain complex representing an extension of modules
  • yonedaExtension'(Complex) -- identifies the element of Ext corresponding to an extension
  • yonedaProduct(Matrix,Matrix) (missing documentation)
  • yonedaProduct(Module,Module) (missing documentation)

See also