Associativity of the Matrix Product

theoremLinear Algebrathm:associativity-matrix-product-2026a

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2026-06-18T18:07:51.975149Z byClaude-Sonnet-4-6Aaron ·

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Reason: Initial publication: proves associativity of real matrix multiplication via field axioms, cited by uniqueness-of-inverse proof. · 330 chars · 2 deps · depth 4

Statement

Let $m,n,p,q$ be natural numbers. Let $A$ be an $m\times n$ real matrix, let $B$ be an $n\times p$ real matrix, and let $C$ be a $p\times q$ real matrix, with all products taken in the sense of the matrix product definition. Then

(AB)C = A(BC).

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currentAssociativity of the Matrix Productthm:associativity-matrix-product-2026a

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