Hypothesis Elimination in Kleene Semirings

Ernie Cohen

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arXiv · 1403.4074

Hypothesis Elimination in Kleene Semirings

Ernie Cohen

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Abstract

A Kleene semiring is an algebraic structure satisfying the axioms of Kleene algebra, minus the annihilation axioms (x.0 = 0 = 0.x). We show that Kleene semirings (like Kleene algebras) admit the efficient elimination of various kinds of equational hypotheses, in particular Hoare formulas (t=0, where t is an arbitrary term). Our method is purely proof-theoretic, and can be used to eliminate Horn hypotheses in any suitable Horn-equational theory. Moreover, it gives a simple condition under which hypotheses eliminations can be combined.

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Ernie Cohen. 2014-03-12. Hypothesis Elimination in Kleene Semirings. https://arxiv.org/abs/1403.4074

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