2 papers
cs.LO2025
From Interpolating Formulas to Separating Languages and Back Again
Agi Kurucz, Frank Wolter, Michael Zakharyaschev
Traditionally, research on Craig interpolation is concerned with (a) establishing the Craig interpolation property (CIP) of a logic saying that every valid implication in the logic…
cs.LO2025
Separation and Definability in Fragments of Two-Variable First-Order Logic with Counting
Louwe Kuijer, Tony Tan, Frank Wolter +1
For fragments L of first-order logic (FO) with counting quantifiers, we consider the definability problem, which asks whether a given L-formula can be equivalently expressed by a f…