Higher order logic theorem proving and its applications : proceedings of the IFIP TC10/WG10.2 International Workshop on Higher Order Logic Theorem Proving and Its Applications--HOL '92 / organized by CHEOPS ESPRIT BRA 3215 ; sponsored by IMEC and the Commission of the European Communities, Leuven, Belgium, 21-24 September 1992 ; edited by Luc J.M. Claesen, Michael J.C. Gordon / Amsterdam : North-Holland , 1993