© 2004 by Oxford University Press
Tabular Logics with no Finite Bases for Inference Rules
Department of Computing and Mathematics, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD, U.K. V.Rybakov{at}mmu.ac.uk
We find an example of a rooted, finite, partially ordered set Q9 such that the superintuitionistic logic L(Q9) generated by Q9 has no finite bases for admissible inference rules. The modal logic based on Q9 also has the same property.
Received 21 October 2003. Revised 15 June 2004.