abstract. We show that the Medvedev logic ML is not finitely axiomatizable over the logic Cheq of chequered subsets of R. This gives a negative solution to one of the questions rai...
In recent years, a tight connection has emerged between modal logic on the one hand and coalgebras, understood as generic transition systems, on the other hand. Here, we prove tha...
In this paper we study the intermediate logic MLO(X) of open subsets of a metric space X. This logic is closely related to Medvedev's logic of finite problems ML. We prove sev...
: Since modern programmable devices contain embedded memory blocks, there exists a possibility to implement Finite State Machines (FSM) using such blocks. The size of the memory av...
Coalgebras provide a uniform framework for the semantics of a large class of (mostly non-normal) modal logics, including e.g. monotone modal logic, probabilistic and graded modal l...