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Effect algebras and pseudoeffect algebras were introduced by Foulis, Bennett, Dvurecenskij and Vetterlein as so-called quantum structures which serve as an algebraic axiomatization of the logic of quantum mechanics. A natural question…

Logic · Mathematics 2019-07-08 Ivan Chajda , Helmut Länger

Since orthomodular posets serve as an algebraic axiomatization of the logic of quantum mechanics, it is a natural question how the connective of implication can be defined in this logic. It should be introduced in such a way that it is…

Logic · Mathematics 2019-07-25 Ivan Chajda , Helmut Länger

The concept of operator left residuation has been introduced by the authors in a previous paper. Modifications of so-called quantum structures, in particular orthomodular posets, like pseudo-orthomodular, pseudo-Boolean and Boolean posets…

Logic · Mathematics 2018-10-18 Ivan Chajda , Helmut Länger

Orthomodular posets form an algebraic formalization of the logic of quantum mechanics. The question is how to introduce the connective implication in such a logic. We show that this is possible when the orthomodular poset in question is of…

Logic · Mathematics 2020-03-12 Ivan Chajda , Helmut Länger

The aim of the present paper is to show that the concept of intuitionistic logic based on a Heyting algebra can be generalized in such a way that it is formalized by means of a bounded poset. In this case it is not assumed that the poset is…

Logic · Mathematics 2023-08-23 Ivan Chajda , Helmut Länger

We show that every complemented modular lattice can be converted into a left residuated lattice where the binary operations of multiplication and residuum are term operations. The concept of an operator left residuated poset was introduced…

Logic · Mathematics 2018-12-27 Ivan Chajda , Helmut Länger

The aim of the present paper is to generalize the concept of residuated poset, by replacing the usual partial ordering by a generic binary relation, giving rise to relational systems which are residuated. In particular, we modify the…

Logic · Mathematics 2020-04-20 Stefano Bonzio , Ivan Chajda

Effect algebras form a formal algebraic description of the structure of the so-called effects in a Hilbert space which serves as an event-state space for effects in quantum mechanics. This is why effect algebras are considered as logics of…

Logic · Mathematics 2019-08-16 Ivan Chajda , Helmut Länger

Using the operators of taking upper and lower cones in a poset with a unary operation, we define operators M(x,y) and R(x,y) in the sense of multiplication and residuation, respectively, and we show that by using these operators, a general…

Logic · Mathematics 2018-09-27 Ivan Chajda , Helmut Länger

We show that for every orthomodular poset P of finite height there can be defined two operators forming an adjoint pair with respect to an order-like relation defined on the power set of P. This enables us to introduce the so-called…

Logic · Mathematics 2022-04-25 Ivan Chajda , Helmut Länger

Not all logical systems can be captured using algebras. We see this in classical logic (formalized by Boolean algebras) and many-valued logics (like Lukasiewicz logic with MV-algebras). Even quantum mechanics, initially formalized with…

Logic · Mathematics 2024-07-01 Ivan Chajda , Helmut Länger , Antonio Ledda , Jan Paseka , Gandolfo Vergottini

M. Busaniche, R. Cignoli, C. Tsinakis and A. M. Wille showed that every residuated lattice induces a residuation on its full twist product. For their construction they used also lattice operations. We generalize this problem to…

Rings and Algebras · Mathematics 2020-12-01 Ivan Chajda , Helmut Länger

It is well-known that relatively pseudocomplemented lattices can serve as an algebraic semantics of intuitionistic logic. To extend the concept of relative pseudocomplementation to non-distributive lattices, the first author introduced…

Logic · Mathematics 2021-08-24 Ivan Chajda , Helmut Länger

It is widely accepted that the logic of quantum mechanics is based on orthomodular posets. However, such a logic is not dynamic in the sense that it does not incorporate time dimension. To fill this gap, we introduce certain tense operators…

Logic · Mathematics 2023-04-19 Ivan Chajda , Helmut Länger

Effect algebras were introduced in order to describe the structure of effects, i.e. events in quantum mechanics. They are partial algebras describing the logic behind the corresponding events. It is natural to ask how to introduce the…

Logic · Mathematics 2023-03-22 Ivan Chajda , Helmut Länger

Generalized orthomodular posets were introduced recently by D. Fazio, A. Ledda and the first author of the present paper in order to establish a useful tool for studying the logic of quantum mechanics. They investigated structural…

Logic · Mathematics 2020-09-14 Ivan Chajda , Helmut Länger

This paper investigates the intersection of residuated structures from many-valued logic and orthomodular lattices from quantum logic. We explore whether non-Boolean structures can simultaneously satisfy residuation principles and…

Logic · Mathematics 2026-02-26 Michal Botur , David Kruml , Jan Paseka

Effect algebras form an algebraic formalization of the logic of quantum mechanics. For lattice effect algebras E we investigate a natural implication and prove that the implication reduct of E is term equivalent to E. Then we present a…

Logic · Mathematics 2020-01-22 Ivan Chajda , Radomír Halaš , Helmut Länger

The concept of operator residuation for bounded posets with unary operation was introduced by the first two authors. It turns out that in some cases when these operators are transformed into lattice terms and the poset ${\mathbf P}$ is…

Logic · Mathematics 2018-12-27 Ivan Chajda , Helmut Länger , Jan Paseka

We introduce the concept of a quasiresiduated lattice and prove that every lattice effect algebra can be organized into a commutative quasiresiduated lattice with divisibility. Also conversely, every such a lattice can be converted into a…

Logic · Mathematics 2019-05-15 Ivan Chajda , Helmut Länger
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