This book constitutes the refereed proceedings of the 9th International Conference on Theorem Proving in Higher Order Logics, TPHOL '96, held in Turku, Finland, in August 1996. The 27 revised full papers included together with one invited paper were carefully selected from a total of 46 submissions. The topics addressed are theorem proving technology, proof automation and decision procedures, mechanized theorem proving, extensions of higher order logics, integration of external tools, novel applications, and others. All in all, the volume is an up-to-date report on the state of the art in this increasingly active field.
