The last decade has seen a revival of interest in pebble games in the context of proof complexity. Pebbling has proven to be a useful tool for studying resolution-based proof syst...
Abstract. In this paper we will give an outline of the proof of the solvability of the halting and reachability problem for 2-symbolic tag systems with a deletion number v = 2. Thi...
: This paper introduces the notion of pedagogical natural deduction systems, which are natural deduction systems with the following additional constraint: all hypotheses made in a ...
This paper describes the design, implementation, and testing of a system for selecting necessary axioms from a large set also containing superfluous axioms, to obtain a proof of a...
Yi and Sakai [9] showed that the termination problem is a decidable property for the class of semi-constructor term rewriting systems, which is a superclass of the class of right ...