Abstract
We continue with the functional approach to the P -versus- NP problem, begun in [J. C. Birget, Semigroups and one-way functions, Int. J. Algebra Comput. 25(1–2) (2015) 3–36; J. C. Birget, Infinitely generated semigroups and polynomial complexity, Int. J. Algebra Comput. 26(04) (2016) 727–750.] We previously constructed a monoid [Formula: see text] that is non-regular iff NP [Formula: see text] P . We now construct homomorphic images of [Formula: see text] with interesting properties. In particular, the homomorphic image [Formula: see text] of [Formula: see text] is finitely generated, and is non-regular iff P [Formula: see text] NP . The group of units of [Formula: see text] is the famous Richard Thompson group [Formula: see text].
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