Singular homology + cohomology

Layer 0 — Mathematicsin the algebraic-topology subtree

Eilenberg-Steenrod 1952 axioms. Singular: simplicial-chains on continuous-maps Δ^n → X. H_n(X) functorial homotopy-invariant. Cohomology + cup-product = ring-structure.

Related concepts

Cohomology H^n(X)

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