Relative Homology
For a subspace, the relative homology Hn(X, A) is understood to be the homology of the quotient of the chain complexes, that is,
where the quotient of chain complexes is given by the short exact sequence
Read more about this topic: Singular Homology
Famous quotes containing the word relative:
“Are not all finite beings better pleased with motions relative than absolute?”
—Henry David Thoreau (1817–1862)