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Complexity for probability logic with quantifiers over propositions
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 for which the validity problem is undecidable.
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английский
The class of all ∗-continuous Kleene algebras, whose description includes an infinitary condition on the iteration operator, plays an important role in computer science. The complexity of reasoning in such algebras — ranging from the equational theory to the Horn one, with restricted fragments of the latter in between — was analyzed by Kozen (2002). This ...
Добавлено: 12 августа 2026 г.
Сперанский С. О., Математические заметки 2026 Т. 120 № 3 С. 470–483
Показывается, что с точки зрения замыкающих ординалов многие инфинитарные исчисления для «первопорядковых» логик вероятности (т.е. для языков, аналогичных языкам из [Abadi & Halpern 1994]) являются настолько трудными, насколько это возможно: соответствующие замыкающие ординалы совпадают с наименьшим неконструктивным ординалом, обозначаемым через $\omega_1^{\mathrm{CK}}$. ...
Добавлено: 12 августа 2026 г.
Сперанский С. О., Grefenshtein A., Izvestiya. Mathematics 2026 Vol. 90 No. 4 P. 105–126
The article is concerned with Halpern's first-order logics of probability, which we denote by L_1 and L_2 – the first of these deals with probability distributions on the domain, while the second employs distributions on external sets of possible worlds. The proofs of [Abadi & Halpern 1994] of the complexity lower bound results for L_1 and L_2 ...
Добавлено: 12 августа 2026 г.
David J. L., Leonid Grinin, Коротаев А. В., , in: Complexity in Universal Evolution. A Big History Perspective.: Springer, 2026. Ch. 22 P. 585–608.
Добавлено: 10 августа 2026 г.
Коротаев А. В., , in: Complexity in Universal Evolution. A Big History Perspective.: Springer, 2026. Ch. 13 P. 359–409.
Добавлено: 10 августа 2026 г.
Leonid Grinin, Alexander M., Коротаев А. В., , in: Complexity in Universal Evolution. A Big History Perspective.: Springer, 2026. Ch. 12 P. 283–355.
Добавлено: 10 августа 2026 г.
David J. L., Leonid Grinin, Коротаев А. В., , in: Complexity in Universal Evolution. A Big History Perspective.: Springer, 2026. Ch. 1 P. 1–25.
Добавлено: 10 августа 2026 г.
Рыбаков М. Н., Annals of Pure and Applied Logic 2026 Vol. 177 No. 10 Article 103811
Добавлено: 11 июля 2026 г.
Springer, 2026.
Добавлено: 30 июня 2026 г.
Добавлено: 16 февраля 2026 г.
Odintsov S., Сперанский С. О., Logic and Logical Philosophy 2012 Vol. 21 No. 3 P. 209–228
The present paper is devoted to computational aspects of propositional inconsistency-adaptive logics. In particular, we prove (relativized versions of) some principal results on computational complexity of derivability in such logics, namely in cases of CLuN-r and CLuN-m , i.e., CLuN supplied with the reliability strategy and the minimal abnormality strategy, respectively. ...
Добавлено: 27 декабря 2025 г.
Сперанский С. О., Studia Logica 2013 Vol. 101 No. 6 P. 1237–1262
In a rather general setting, we prove a number of basic theorems concerning computational complexity of derivability in adaptive logics. For that setting, the so-called standard format of adaptive logics is suitably adopted, and the corresponding completeness results are established in a very uniform way. ...
Добавлено: 27 декабря 2025 г.
Сперанский С. О., 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 ...
Добавлено: 27 декабря 2025 г.
Сперанский С. О., Studia Logica 2017 Vol. 105 No. 2 P. 407–429
The paper contains a survey on the complexity of various truth hierarchies arising in Kripke’s theory. I present some new arguments, and use them to obtain a number of interesting generalisations of known results. These arguments are both relatively simple, involving only the basic machinery of constructive ordinals, and very general. ...
Добавлено: 26 декабря 2025 г.
Сперанский С. О., Mathematical Structures in Computer Science 2017 Vol. 27 No. 8 P. 1581–1600
In this article we describe a bunch of probability logics with quantifiers over events, and develop primary techniques for proving computational complexity results (in terms of m-degrees) about these logics, mainly over discrete probability spaces. Also the article contains a comparison with some other probability logics and a discussion of interesting analogies with research in the metamathematics ...
Добавлено: 26 декабря 2025 г.
Кузнецов С. Л., Сперанский С. О., Annals of Pure and Applied Logic 2022 Vol. 173 No. 2 Article 103057
We introduce infinitary action logic with exponentiation — that is, the multiplicative-additive Lambek calculus extended with Kleene star and with a family of subexponential modalities, which allow some of the structural rules (contraction, weakening, permutation). The logic is presented in the form of an infinitary sequent calculus. We prove cut elimination and, in the case ...
Добавлено: 26 декабря 2025 г.
Кузнецов С. Л., Сперанский С. О., Studia Logica 2023 Vol. 111 No. 2 P. 251–280
Infinitary action logic can be naturally expanded by adding exponential and subexponential modalities from linear logic. In this article we shall develop infinitary action logic with a subexponential that allows multiplexing (instead of contraction). Both non-commutative and commutative versions of this logic will be considered, presented as infinitary sequent calculi. We shall prove cut admissibility ...
Добавлено: 26 декабря 2025 г.
Сперанский С. О., Izvestiya. Mathematics 2025 Vol. 89 No. 3 P. 609–627
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 ...
Добавлено: 26 декабря 2025 г.