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