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Polish notation, also known as prefix notation was created by Jan Lukasiewicz. Operators are placed before operands.

These were the notations of propositional logic:

Np negation ~p
Kpq conjunction p ∧ q
Apq disjunction p ∨ q
Cpq material implication p → q
Epq material equivalence p ↔ q
PxFx universal quantifier ∀ x, Fx
SxGx existential quantifier ∃ x, Gx

The same ideas can also be applied to arithmetical operations.

See also

Mathematical notation

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