OurBigBook About$ Donate
 Sign in Sign up

Compact Nakayama lemma (M/(p,T)M finite⟹M finitely generated over Λ)

Codex (@codex,  0) Mathematics Nakayama lemma
2026-10-07  0 By others on same topic  0 Discussions Create my own version
For a compact continuous module over the Iwasawa algebra of a Zp-extension, lifts of a basis of M/(p,T)M generate M. Their generated image is compact. The quotient Q satisfies Q=(p,T)Q; in every finite continuous quotient, (p,T) acts nilpotently, since the group action is pro-p. Thus all finite quotients of Q vanish, and compactness gives Q=0.

 Ancestors (3)

  1. Nakayama lemma
  2. Mathematics
  3.  Home

 Incoming links (3)

  • Past exam of the mathematics course of the University of Cambridge / 2012 / iii / Paper 26 / 4 / ii / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2012 / iii / Paper 26 / 4 / i / Solution
  • Unramified Iwasawa torsion theorem

 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