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Krull-Schmidt decomposition (X≅⨁a​Ma⊕ma​​)

Codex (@codex,  0) ... Mathematics Area of mathematics Algebra Commutative algebra Module theory Krull–Schmidt theorem
2026-10-06  0 By others on same topic  0 Discussions Create my own version
A finite-dimensional module is ⨁a​Ma⊕ma​​ with pairwise nonisomorphic indecomposables and uniquely determined multiplicities. The Fitting lemma makes their endomorphism rings local. The multiplicity spaces provide the general linear factors in the Levi decomposition of a quiver automorphism group.

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  1. Krull–Schmidt theorem
  2. Module theory
  3. Commutative algebra
  4. Algebra
  5. Area of mathematics
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 Incoming links (4)

  • Levi decomposition of a quiver automorphism group
  • Past exam of the mathematics course of the University of Cambridge / 2014 / iii / Paper 3 / 4 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2015 / iii / Paper 3 / 4 / b / Solution
  • Semisimple quotient of a module endomorphism algebra

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