Results 1  10
of
50
Rules and Strategies for Transforming Functional and Logic Programs
 ACM Computing Surveys
, 1996
"... We present an overview of the program transformation methodology, focusing our attention on the socalled `rules + strategies' approach in the case of functional and logic programs. The paper is intended to offer an introduction to the subject. The various techniques we present are illustrated ..."
Abstract

Cited by 72 (4 self)
 Add to MetaCart
We present an overview of the program transformation methodology, focusing our attention on the socalled `rules + strategies' approach in the case of functional and logic programs. The paper is intended to offer an introduction to the subject. The various techniques we present are illustrated via simple examples. A preliminary version of this report has been published in: Moller, B., Partsch, H., and Schuman, S. (eds.): Formal Program Development. Lecture Notes in Computer Science 755, Springer Verlag (1993) 263304. Also published in: ACM Computing Surveys, Vol 28, No. 2, June 1996. 3 1 Introduction The program transformation approach to the development of programs has first been advocated by [BurstallDarlington 77], although the basic ideas were already presented in previous papers by the same authors [Darlington 72, BurstallDarlington 75]. In that approach the task of writing a correct and efficient program is realized in two phases: the first phase consists in writing an in...
Mechanizing structural induction
, 1976
"... A theorem proving system has been programmed for automating mildly complex proofs by structural induction. One purpose was to prove properties of simple functional programs without loops or assignments. One can see the formal system as a generalization of number theory: the formal language is typed ..."
Abstract

Cited by 39 (0 self)
 Add to MetaCart
A theorem proving system has been programmed for automating mildly complex proofs by structural induction. One purpose was to prove properties of simple functional programs without loops or assignments. One can see the formal system as a generalization of number theory: the formal language is typed and the induction rule is valid for all types. Proofs are generated by working backward from the goal. The induction strategy splits into two parts: (1) the selection of induction variables, which is claimed to be linked to the useful generalization of terms to variables, and (2) the generation of induction subgoals, in particular, the selection and specialization of hypotheses. Other strategies include a fast simplification algorithm. The prover can cope with situations as complex as the definition and correctness proof of a simple compiling algorithm for expressions. Descriptive Terms Program proving, theorem proving, data type, structural induction, generalization, simplification.
Transformation of Logic Programs
 Handbook of Logic in Artificial Intelligence and Logic Programming
, 1998
"... Program transformation is a methodology for deriving correct and efficient programs from specifications. In this chapter, we will look at the so called 'rules + strategies' approach, and we will report on the main techniques which have been introduced in the literature for that approach, i ..."
Abstract

Cited by 34 (3 self)
 Add to MetaCart
Program transformation is a methodology for deriving correct and efficient programs from specifications. In this chapter, we will look at the so called 'rules + strategies' approach, and we will report on the main techniques which have been introduced in the literature for that approach, in the case of logic programs. We will also present some examples of program transformation, and we hope that through those examples the reader may acquire some familiarity with the techniques we will describe.
The BoyerMoore Theorem Prover and Its Interactive Enhancement
, 1995
"... . The socalled "BoyerMoore Theorem Prover" (otherwise known as "Nqthm") has been used to perform a variety of verification tasks for two decades. We give an overview of both this system and an interactive enhancement of it, "PcNqthm," from a number of perspectives. F ..."
Abstract

Cited by 30 (0 self)
 Add to MetaCart
. The socalled "BoyerMoore Theorem Prover" (otherwise known as "Nqthm") has been used to perform a variety of verification tasks for two decades. We give an overview of both this system and an interactive enhancement of it, "PcNqthm," from a number of perspectives. First we introduce the logic in which theorems are proved. Then we briefly describe the two mechanized theorem proving systems. Next, we present a simple but illustrative example in some detail in order to give an impression of how these systems may be used successfully. Finally, we give extremely short descriptions of a large number of applications of these systems, in order to give an idea of the breadth of their uses. This paper is intended as an informal introduction to systems that have been described in detail and similarly summarized in many other books and papers; no new results are reported here. Our intention here is merely to present Nqthm to a new audience. This research was supported in part by ONR Contract N...
A Theorem Prover for a Computational Logic
, 1990
"... We briefly review a mechanical theoremprover for a logic of recursive functions over finitely generated objects including the integers, ordered pairs, and symbols. The prover, known both as NQTHM and as the BoyerMoore prover, contains a mechanized principle of induction and implementations of line ..."
Abstract

Cited by 24 (0 self)
 Add to MetaCart
We briefly review a mechanical theoremprover for a logic of recursive functions over finitely generated objects including the integers, ordered pairs, and symbols. The prover, known both as NQTHM and as the BoyerMoore prover, contains a mechanized principle of induction and implementations of linear resolution, rewriting, and arithmetic decision procedures. We describe some applications of the prover, including a proof of the correct implementation of a higher level language on a microprocessor defined at the gate level. We also describe the ongoing project of recoding the entire prover as an applicative function within its own logic.
Software Specification: A Comparison of Formal Methods
, 2001
"... Data Types and Software Validation ," Communications of the ACM, Vol. 21, No. 12, 1978, pp. 10481064. ..."
Abstract

Cited by 14 (0 self)
 Add to MetaCart
Data Types and Software Validation ," Communications of the ACM, Vol. 21, No. 12, 1978, pp. 10481064.
Modelling Distributed Systems
 In IJCAI77
, 1977
"... Distributed systems are multiprocessor information processing systems which do not rely on the central shared memory for communication. The importance of distributed systems has been growing with the advent of "computer ..."
Abstract

Cited by 11 (1 self)
 Add to MetaCart
Distributed systems are multiprocessor information processing systems which do not rely on the central shared memory for communication. The importance of distributed systems has been growing with the advent of &quot;computer
Towards higherlevel supercompilation
 SECOND INTERNATIONAL WORKSHOP ON METACOMPUTATION IN RUSSIA
, 2010
"... We show that the power of supercompilation can be increased by constructing a hierarchy of supercompilers, in which a lowerlevel supercompiler is used by a higherlevel one for proving improvement lemmas. The lemmas thus obtained are used to transform expressions labeling nodes in process trees, in ..."
Abstract

Cited by 10 (7 self)
 Add to MetaCart
We show that the power of supercompilation can be increased by constructing a hierarchy of supercompilers, in which a lowerlevel supercompiler is used by a higherlevel one for proving improvement lemmas. The lemmas thus obtained are used to transform expressions labeling nodes in process trees, in order to avoid premature generalizations. Such kind of supercompilation, based on a combination of several metalevels, is called higherlevel supercompilation (to differentiate it from higherorder supercompilation related to transforming higherorder functions). Higherlevel supercompilation may be considered as an application of a more general principle of metasystem transition.