Equational semantics for basic LOTOS and an example of its use in a transformational proof style

LOTOS is a formal description technique for specifying and analyzing distributed systems. It is shown that equational semantics can be given for a subset called Basic LOTOS. A method based on Boolean equations is used. The semantics are shown to be consistent and complete. The equations for Basic LOTOS are found to form a sufficient basis for writing elegant proofs in a transformational style, which has many advantages compared to the more informal style in which proofs are normally presented. An example of such a transformational proof is given