eng
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Leibniz International Proceedings in Informatics
1868-8969
2022-07-23
2:1
2:17
10.4230/LIPIcs.CP.2022.2
article
Fixed-Template Promise Model Checking Problems
Asimi, Kristina
1
Barto, Libor
1
https://orcid.org/0000-0002-8481-6458
Butti, Silvia
2
https://orcid.org/0000-0002-0171-2021
Department of Algebra, Faculty of Mathematics and Physics, Charles University, Prague, Czechia
Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
The fixed-template constraint satisfaction problem (CSP) can be seen as the problem of deciding whether a given primitive positive first-order sentence is true in a fixed structure (also called model). We study a class of problems that generalizes the CSP simultaneously in two directions: we fix a set ℒ of quantifiers and Boolean connectives, and we specify two versions of each constraint, one strong and one weak. Given a sentence which only uses symbols from ℒ, the task is to distinguish whether the sentence is true in the strong sense, or it is false even in the weak sense.
We classify the computational complexity of these problems for the existential positive equality-free fragment of first-order logic, i.e., ℒ = {∃,∧,∨}, and we prove some upper and lower bounds for the positive equality-free fragment, ℒ = {∃,∀,∧,∨}. The partial results are sufficient, e.g., for all extensions of the latter fragment.
https://drops.dagstuhl.de/storage/00lipics/lipics-vol235-cp2022/LIPIcs.CP.2022.2/LIPIcs.CP.2022.2.pdf
Model Checking Problem
First-Order Logic
Promise Constraint Satisfaction Problem
Multi-Homomorphism