The dual geometry of Boolean semirings

Details The dual geometry of Boolean semirings The dual geometry of Boolean semirings

2008-01-31

arxiv.org/abs/0801.4923v1

Mathematics

Category Theory

18 pages

Scientific paper

It is well known that the variety of Boolean semirings, which is generated by the three element semiring S, is dual to the category of partially Stone spaces. We place this duality in the context of natural dualities. We begin by introducing a topological structure \uS and obtain an optimal natural duality between the quasi-variety ISP(S) and the category IS_cP+(\uS). Then we construct an optimal and very small structure \uS_os that yields a strong duality. The geometry of some of the partially Stone spaces that take part in these dualities is presented, and we call them "hairy cubes", as they are n-dimensional cubes with unique incomparable covers for each element of the cube. We also obtain a polynomial representation for the elements of the hairy cube.

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