Higher Order Logic. A proof-generating system for higher order logic based on LCF. Implementations include HOL-88 and HOL-90.

. Mailing list: [email protected].

["HOL: A Machine Oriented Formulation of Higher Order Logic", M.J.C. Gordon, Report 68, Comp Lab U Cambridge (1985)].

["Introduction to HOL", M.J.C. Gordon et al, Cambridge U Press 1993 ISBN 0-521-441897].