List of algebraic topology topics: Meaning (information, definition, explanation, facts)

This is a list of algebraic topology topics, by Wikipedia page.

Homology (mathematics)

Main article:Homology theory

• Simplex
• Simplicial complex
  • Polytope
  • Triangulation
  • Barycentric subdivision
  • Simplicial approximation theorem
  • Abstract simplicial complex
• Chain (mathematics)
• Betti number
• Euler characteristic
  • Genus
  • Riemann-Hurwitz formula
• Singular homology
• Mayer-Vietoris sequence
• Cohomology
  • Cocycle class
  • Cup product
  • De Rham cohomology
  • Alexander-Spanier cohomology
  • Intersection cohomology
  • Lyusternik-Schnirelmann category
• Poincaré duality
• Fundamental class
• Applications
  • Jordan curve theorem
  • Brouwer fixed point theorem
  • Invariance of domain
  • Lefschetz fixed-point theorem
  • Hairy ball theorem
  • Degree (mathematics)
  • Borsuk-Ulam Theorem
  • Ham sandwich theorem
  • Homology sphere

• Homotopy
• Fundamental group

• Seifert-van Kampen theorem
• Winding number
• Simply connected
  • Universal cover
• Monodromy
• Homotopy lifting property
• Homotopy group
• Wedge sum, smash product
• Cohomotopy
• Cohomotopy group
• Fibre bundle
  • Möbius strip
  • Line bundle
    • Canonical line bundle
  • Vector bundle
  • Associated bundle
  • Fibration
  • Hopf bundle
• Plus construction
• Hurewicz theorem
• H-space

• Künneth theorem
• De Rham cohomology
• Characteristic class
  • Chern class
  • Chern-Simons form
  • Pontryagin class
  • Pontryagin number
  • Stiefel-Whitney class
• Poincaré conjecture
• Bott periodicity theorem
• K-theory
  • Algebraic K-theory
  • Whitehead torsion
• Cobordism
• Hodge conjecture
• Weil conjectures

• Chain complex
• Commutative diagram
• Exact sequence
  • Five lemma
  • Short five lemma
  • Snake lemma
  • Splitting lemma
  • Extension problem
• Abelian category
• Group cohomology
• Sheaf
  • Grothendieck topology

• Combinatorial topology