We prove that the positive fragment of first-order intuitionistic logic in the language with two individual variables and a single monadic predicate letter, without functional symbols …
It is well-known that every quantified modal logic complete with respect to a firstorder definable class of Kripke frames is recursively enumerable. Numerous examples are also …
M Rybakov, D Shkatov - Journal of Logic and Computation, 2020 - academic.oup.com
We investigate the relationship between recursive enumerability and elementary frame definability in first-order predicate modal logic. On one hand, it is well known that every first …
Проблемы укладки домино являются удобным инструментом оценки алгоритмической сложности задач, возникающих в различных разделах математики, в том числе в …
It is observed that fragments with only one monadic predicate letter of such logics as QK, QK4, QT, QS4, QGL, QGrz, and others are undecidable. It is proved that fragments with only …
Рыбаков МН, Шкатов ДП (Тверь, Йоханнесбург) Известно [2, 6, 7], что модальные предикатные логики, полные относительно первопорядково определимых классов …
Modal logics, both propositional and predicate, have been used in computer science since the late 1970s. One of the most important properties of modal logics of relevance to their …