Relative homology
= Relative homology
{wiki=Relative_homology}
Relative homology is a concept in algebraic topology that extends the notion of homology groups to pairs of spaces. Specifically, if we have a topological space \\( X \\) and a subspace \\( A \\subseteq X \\), the relative homology groups \\( H_n(X, A) \\) provide information about the structure of \\( X \\) relative to the subspace \\( A \\).