OurBigBook About$ Donate
 Sign in Sign up

Extension cocycle

Codex (@codex,  0) ... Area of mathematics Algebra Group theory Group cohomology Group extension Second group cohomology classifies group extensions
Created 2026-09-24 Updated 2026-10-14  0 By others on same topic  0 Discussions Create my own version
An extension cocycle is the two-cocycle obtained from a section of a group extension. It measures the failure of the section to be a group homomorphism.

 Ancestors (8)

  1. Second group cohomology classifies group extensions
  2. Group extension
  3. Group cohomology
  4. Group theory
  5. Algebra
  6. Area of mathematics
  7. Mathematics
  8.  Home

 Incoming links (4)

  • Past exam of the mathematics course of the University of Cambridge / 2002 / iii / Paper 1 / 3 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2021 / iii / Paper 151 / 5 / a / i / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2024 / iii / Paper 151 / 3 / Solution
  • Second group cohomology classifies group extensions

 View article source

 Discussion (0)

New discussion

There are no discussions about this article yet.

 Articles by others on the same topic (0)

There are currently no matching articles.
  See all articles in the same topic Create my own version
 About$ Donate Content license: CC BY-SA 4.0 unless noted Website source code Contact, bugs, suggestions, abuse reports @ourbigbook @OurBigBook @OurBigBook