Bulletin of the Section of Logic 18/1 (1989)details


Table of contents

• 1. Boguslaw WOLNIEWICZ, Entailments and independence in join-semilattices2


• 2. Krzysztof SZYMANEK, On information functions, part one: Basic formal properties6


• 3. Krzysztof SZYMANEK, On information functions, part two: Applications to the logic of theory change13


• 4. Vladimir M.POPOV, On a closure of a set of classically essential formulas and on relevant implication20


• 5. Ewa GRACZYNSKA, On connections between identities and hiperidentities25


• 6. Ewa GRACZYNSKA, Regular equations and unification theory30