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06/14/2022
EXPTIME-hardness of higher-dimensional Minkowski spacetime
We prove the EXPTIME-hardness of the validity problem for the basic temp...
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05/14/2021
Demonic Lattices and Semilattices in Relational Semigroups with Ordinary Composition
Relation algebra and its reducts provide us with a strong tool for reaso...
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09/25/2020
The algebra of non-deterministic programs: demonic operators, orders and axioms
Demonic composition, demonic refinement and demonic union are alternativ...
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09/15/2020
Finite Representability of Semigroups with Demonic Refinement
Composition and demonic refinement ⊑ of binary relations are defined by ...
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06/26/2018
The temporal logic of two-dimensional Minkowski spacetime with slower-than-light accessibility is decidable
We work primarily with the Kripke frame consisting of two-dimensional Mi...
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06/29/2016
