Explore relationships

Cohomology

Algebraic structure used in topologyA Möbius strip, showing it being cut along the middle: the cut strip is not twisted because the first cohomology is a group: (−1)2=+1{\displaystyle (-1)^{2}=+1}.In mathematics, specifically in homology theory and algebraic topology, cohomology is a way of attaching algebraic invariants to a topological space or other mathematical object that encode its properties in a way that is often computable.

Use + to expand a branch. Click a topic name to open its summary.