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Macaulay2 web site
SpectralSequences
::
connectingMorphism
connectingMorphism -- use spectral sequences to compute connecting morphisms
Synopsis
Usage:
g = connectingMorphism(f, n)
Inputs:
f
,
a
chain complex map
n
,
an
integer
Outputs:
g
,
a
matrix
Description
Given a morphism
f: A →B
of chain complexes returns the connecting map
H
n+1
(coker f) →H
n
(im f)
.
Ways to use
connectingMorphism
:
connectingMorphism(ChainComplexMap,ZZ)
-- use spectral sequences to compute connecting morphisms