Cleary, JohnDewar, Alan2008-02-272008-02-271983-11-01http://hdl.handle.net/1880/45803The logic programming language Prolog and extensions to permit asynchronous execution are introduced. Some simple producer/consumer problems are used to illustrate the handling of processes and their synchronization. Some tools that can be used to aid tracing and verifying such programs are described. These include a system that will check whether one version of a program is a refinement of another, and another that allows simple and flexible programming of graphical displays of data structures and executing programs. These are used as examples to support the assertion that logic programming provides very powerful tools for verifying the correctness of simulations and programs.EngComputer Scienceunknown1983-134-2310.11575/PRISM/30547