The system PL permits the translation of abstract proofs of program correctness into programs in a variety of programming languages. A programming language satisfying certain axioms may be the target of such a translation. The system PL also permits the construction and proof of correctness of programs in an abstract programming language, and permits the translation of these programs into corre...

Object code is a program of a processor language and can be directly executed on a machine. Program verification constructs a formal proof that a program correctly implements its specification. Verifying object code therefore ensures that the program which is to be executed on a machine is correct. However, the nature of processor languages makes it difficult to specify and reason about object ...

This paper describes a way to noticeably reduce the description cost of database operations executed in distributed computing environments by design of a novel declarative language to describe database operations, development of program transformation techniques to improve e ciency at execution time, and clari cation of prerequisites to execute the programs in distributed computing environments...