Bourbaki

Corollary

Tag 008D, permanent. Cite it as [Bourbaki, Tag 008D].

Algebra, VIII, p. 123, § 7. Simple Rings

Let kk be a commutative field, and let A be a simple kk-algebra of finite degree over kk. Every simple A-module is finite-dimensional over kk. Two A-modules are isomorphic if and only if their dimensions over kk are equal.

Every simple A-module is isomorphic to a quotient of AsA_s, hence finite-dimensional over kk. The corollary then follows from Proposition 2, c).

Bourbaki sets the proof directly after the statement, and the corpus does not separate them, so what is above is the statement and its proof together.

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Cites

Transcribed from the printed edition, 2023, Springer Nature. Not translated.