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:
“Man may have his opinion as to the relative importance of feeding his body and nourishing his soul, but he is allowed by Nature to have no opinion whatever as to the need for feeding the body before the soul can think of anything but the body’s hunger.”
—George Bernard Shaw (1856–1950)