Form equivalence class Howard-Rubin Number: 1

Statement:

Birkhoff Representation Theorem: Every algebra isisomorphic to a subdirect product of subdirectly irreducible algebras.

Howard-Rubin number: 1 AX

Citations (articles): Birkhoff [1944] Subdirect unions in universal algebra
Gratzer [1986] Birkhoff's representation theorem is equivalent to the axiom of choice

Connections (notes):

References (books): Book: Universal Algebra [1979], Gratzer, [1979]

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