Polyadic algebra

Polyadic algebras (more recently called Halmos algebras[1]) are algebraic structures introduced by Paul Halmos. They are related to first-order logic analogous to the relationship between Boolean algebras and propositional logic (see Lindenbaum–Tarski algebra).

There are other ways to relate first-order logic to algebra, including Tarski's cylindric algebras[1] (when equality is part of the logic) and Lawvere's functorial semantics (a categorical approach).[2]

References

Michiel Hazewinkel (2000). Handbook of algebra. Vol. 2. Elsevier. pp. 87–89. ISBN 978-0-444-50396-1.
Jon Barwise (1989). Handbook of mathematical logic. Elsevier. p. 293. ISBN 978-0-444-86388-1.

Further reading

Paul Halmos, Algebraic Logic, Chelsea Publishing, New York (1962)

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