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Computational properties of the logic of partial quasiary predicates
P. 58–65.
Shkatov D., Rybakov M.
It is proved that Church theorem and Trakhtenbrot theorem are true for the logic of quasiary predicates.
Shehtman V. B., Gagarin A., , in: Graph Games and Logic Design. Recent Developments and Further Directions. (TREN, volume 66)Vol. 66.: Springer, 2026. Ch. 17 P. 419–450.
The chapter contains an overview of results on products of propositional modal logics and related constructions: semiproducts, Segerberg squares, and others. We focus mainly on axiomatizations, finite model property, and decidability; we also sketch connections with classical and modal predicate logics. In some cases we give ideas of proofs, especially of those using games. ...
Added: June 30, 2026
Springer, 2026.
This book presents established and new research on the close connections between graph games and systems of logic, particularly existing and newly designed modal logics. The volume utilizes two graph games – the sabotage game and the hide-and-seek game – to demonstrate the natural interplay between designing new graph games and exploring new kinds of ...
Added: June 30, 2026
Speranski S. O., Вестник Новосибирского государственного университета. Серия: Математика, механика, информатика 2011 Т. 11 № 4 С. 78–93
В настоящей статье изучаются вычислительные аспекты формального требования максимальной специфичности, накладываемого на правила в языке пропозициональной классической логики, когда над этим языком задана вычислимая рационально-значная вероятностная мера. Доказана неразрешимость ряда общих проблем по обнаружению максимально специфичных правил и вероятностных мер, для которых совокупность всех специфичных правил вычислима; установлена разрешимость множества максимально специфичных правил при неких ...
Added: December 27, 2025
Speranski S. O., Алгебра и логика 2011 Т. 50 № 4 С. 533–546
Язык для рассуждений о вероятности обобщается за счёт добавления в него кванторов по пропозициональным формулам. Далее рассматриваются соответствующие вопросы разрешимости. В частности, представленные результаты демонстрируют неразрешимость проблемы общезначимости для довольно слабого фрагмента нового языка. С другой стороны, устанавливается разрешимость ограниченной проблемы общезначимости для АЕ-предложений. ...
Added: December 27, 2025
Speranski S. O., Journal of Logic and Computation 2013 Vol. 23 No. 5 P. 1035–1055
In the present article, the quantifiers over propositions are first introduced into the language for reasoning about probability, then the complexity issues for validity problems dealing with the corresponding hierarchy of probabilistic sentences are investigated. We prove, among other things, the $\Pi^1_1$-completeness for the general validity and also indicate the least level in the hierarchy ...
Added: December 27, 2025
Speranski S. O., Archive for Mathematical Logic 2013 Vol. 52 No. 5–6 P. 507–516
We carry out a study of definability issues in the standard models of Presburger and Skolem arithmetics (henceforth referred to simply as Presburger and Skolem arithmetics, for short, because we only deal with these models, not the theories, thus there is no risk of confusion) supplied with free unary predicates — which are strongly related to definability in ...
Added: December 27, 2025
Speranski S. O., Izvestiya. Mathematics 2025 Vol. 89 No. 3 P. 193–211
Let QPL-e expand the quantifier-free ‘polynomial’ probability logic of [Fagin et al. 1990] by adding quantifiers over arbitrary events; it can be viewed as a one-sorted elementary language for reasoning about probability spaces. We prove that the $\Sigma_2$-fragment of the QPL-e-theory of finite spaces is hereditarily undecidable. By earlier observations, this implies that $\Pi_2$ is the ...
Added: December 26, 2025
Speranski S. O., Logic Journal of the IGPL 2025 Vol. 33 No. 2 Article jzae042
This paper is concerned with a two-sorted probabilistic language, denoted by QPL, which contains quantifiers over events and over reals, and can be viewed as an elementary language for reasoning about probability spaces. The fragment of QPL containing only quantifiers over reals is a variant of the well-known ‘polynomial’ language from [Fagin et al. 1990, Section 6]. ...
Added: December 26, 2025
Rybakov M., Shkatov D., Studia Logica 2025 Vol. 113 P. 1–48
In the early 1960s, to prove undecidability of monadic fragments of sublogics of the predicate modal logic QS5 that include the classical predicate logic QCl, Saul Kripke showed how a classical atomic formula with a binary predicate letter can be simulated by a monadic modal formula. We consider adaptations of Kripke's simulation, which we call the Kripke trick, to various modal ...
Added: December 2, 2023
Dudakov S., Авхимович Н. В., Вестник Тверского государственного университета. Серия: Прикладная математика 2023 № 1 С. 24–35
В работе рассматриваются алгебраические системы, где в качестве носителя выступают конечные подмножества некоторой безатомной булевой алгебры. Для полученной системы мы вводим новое отношение для конечных подмножеств: считаем, что одно подмножество состоит в отношении с другим подмножеством в том и только том случае, когда все элементы одного подмножества меньше всех элементов другого. Мы демонстрируем, что теория ...
Added: November 12, 2023
Rybakov M., Shkatov D., Journal of Logic and Computation 2025 Vol. 35 No. 2 Article exad078
We show that the monadic modal logic of a single Kripke frame with finitely many possible worlds, but possibly infinite domains, is decidable. This holds true even for monadic multimodal logics with equality, both if equality interpreted as identity and if equality interpreted as congruence. ...
Added: November 3, 2023
Агаджанян И. А., Rybakov M., Шкатов Д. П., / Series arXiv "math". 2023.
The paper investigates algorithmic complexity of monadic multimodal predicate logics with equality over finite Kripke frames or classes of finite Kripke frames. Precise complexity bounds for monadic logics of classes of Kripke frames with finitely many possible worlds are obtained. ...
Added: July 7, 2023
Semenov A., Сопрунов С. Ф., Чебышевский сборник 2021 Т. 22 № 1(77) С. 304–327
The article presents results and open problems related to definability spaces (reducts) and sources of this field since the XIX century. Finiteness conditions and constraints are investigated, including the depth of quantifier alternation and the number of arguments. Results related to the description of lattices of definability spaces for numerical and other natural structures are ...
Added: March 11, 2023
Lomazova I. A., Vladimir A. Bashkin, Jančar P., Fundamenta Informaticae 2022 Vol. 186 No. 1-4 P. 175–194
Petri nets are a popular formalism for modeling and analyzing distributed systems. Tokens in Petri net models can represent the control flow state or resources produced/consumed by transition firings. We define a resource as a part (a submultiset) of Petri net markings and call two resources equivalent when replacing one of them with another in ...
Added: September 4, 2022
Rybakov M., Shkatov D., Journal of Logic and Computation 2021 Vol. 31 No. 5 P. 1266–1288
Изучается алгоритмическая выразительность предикатных логик шкалы Крипке, задаваемой множеством натуральных чисел с отношениями порядка. ...
Added: January 23, 2022
Rybakov M., Shkatov D., Logic Journal of the IGPL 2022 Vol. 30 No. 3 P. 519–533
We obtain an effective embedding of the classical predicate logic into the logic of partial quasiary predicates. The embedding has the property that an image of a non-theorem of the classical logic is refutable in a model of the logic of partial quasiary predicates that has the same cardinality as the classical countermodel of the ...
Added: May 29, 2021
Kikot S., Shapirovsky I., Zolin E., , in: Advances in Modal LogicVol. 13.: College Publications, 2020. P. 369–388.
We give a sufficient condition for Kripke completeness of modal logics that have the transitive closure modality. More precisely, we show that if a modal logic admits what we call definable filtration, then its enrichment with the transitive closure modality (and the corresponding axioms) is Kripke complete; in addition, the resulting logic has the finite ...
Added: December 2, 2020
Rybakov M., Shkatov D., , in: Advances in Modal LogicVol. 13.: College Publications, 2020. P. 523–539.
We study algorithmic properties of first-order predicate monomodal logics of the natural number line in languages with restrictions on the number of individual variables as well as the number and arity of predicate letters. The languages we consider have no constants, function symbols, or the equality symbol. We show that satisfiability for the logics of is not arithmitical in languages ...
Added: August 27, 2020
Rybakov M., Shkatov D., Journal of Logic and Computation 2020 Vol. 30 No. 7 P. 1305–1329
We study the effect of restricting the number of individual variables, as well as the number and arity of predicate letters, in languages of first-order predicate modal logics of finite Kripke frames on the logics’ algorithmic properties. A finite frame is a frame with a finite set of possible worlds. The languages we consider have ...
Added: August 27, 2020
Zhuk D., Algebra Universalis 2014 Vol. 71 No. 1 P. 31–54
We prove that the following problem is decidable: given a finite set of relations on a finite set, decide whether this set admits a near-unanimity function. The proof is based on the upper bound on the minimal arity of a near-unanimity function admitted by a set of relations. Also, we give examples that show that ...
Added: June 15, 2020
Rybakov M., Shkatov D., Journal of Logic and Computation 2020 Vol. 30 No. 2 P. 549–560
We investigate the relationship between recursive enumerability and elementary frame definability in first-order predicate modal logic. On the one hand, it is wellknown that every first-order predicate modal logic complete with respect to an elementary class of Kripke frames, i.e., a class of frames definable by a classical first-order formula, is recursively enumerable. On the ...
Added: October 25, 2019