Csl 89

This volume contains the revised versions of 28 papers presented at the third workshop on Computer Science Logic held in Kaiserslautern, FRG, October 2-6, 1989. These proceedings cover a wide range of topics both from theoretical and applied areas of computer science. More specifically, the papers deal with problems arising at the border of logic and computer science, e.g. in complexity, data base theory, logic programming, artificial intelligece, and temporal logic. The volume should be of interest to all logicians and computer scientists working in the above field.

The 1989 Workshop on the Assessment of Formal Methods for Trustworthy Com puter Systems (FM89} was an invitational workshop that brought together repre sentatives from the research, commercial and governmental spheres of Canada, the United Kingdom, and the United States. The workshop was held in Halifax, Nova Scotia, Canada, from July 23 through July 27, 1989. This document reports the activities, observations, recommendations and conclusions resulting. from FM89. 1. 1 Purpose of Workshop The primary purpose for holding FM89 was to assess the role of formal methods in the development and fielding of trustworthy critical systems. The need for this assessment was predicated upon four observations: 1. Critical systems are increasingly being controlled by computer systems; 2. Existing techniques for developing, assuring and certifying computer-based critical systems are inadequate; 3. Formal methods have the potential for playing the same role in the devel opment of computer-based systems as applied mathematics does for other engineering disciplines; and 4. Formal methods have had limited impact on the development of comput- based systems and supporting technologies. · The goal of the workshop was to complete the following tasks: 1. Assess the problems retarding the development of trustworthy critical systems; 2. Determine the (potential) impact of applying formal methods techniques to the development of trustworthy critical systems; 3. Determine the research and development required to facilitate a broader ap plication of formal methods techniques; 4.

Sanford Schwartz offers a penetrating new reading of Lewis's celebrated Space Trilogy. Taken together, Schwartz's readings call into question Lewis's self-styled image as a "dinosaur" out of step with the main currents of modern thought. Far from a simple struggle between an old-fashioned Christian humanism and a newfangled heresy, Lewis's Space Trilogy should be seen as the searching effort of a modern religious apologist to sustain and enrich the former through critical engagement with the latter.

The algebraic specification of abstract data types has been a flourishing research topic in computer science since 1974. The main goal of this work isto evolve theoretical foundations and a methodology to support the design and formal development of reliable software. This volume gives the proceedings of the Eighth Workshop on Specification of Abstract Data Types, held jointly with the Third COMPASS workshop near Paris in August 1991. The main topics covered by the joint workshop are: - specification languagesand program development - algebraic specification of concurrency - theorem proving - object-oriented specifications - order-sorted algebras - abstract implementation and behavioral semantics. The volume contains four invited surveys and twelve contributed papers, all of which underwent a careful refereeing process.

This pastoral resource assembles in one convenient volume the essential and current liturgical documents needed to prepare and learn about liturgical celebrations for Sunday. Pastoral overviews explain the theology, purpose, and authority of each of the included documents.

Declarative programming languages are based on sound mathematical foundations which means that they offer many advantages for software development. These advantages include their powerful descriptive capabilities, the availability of program analysis techniques and the potential for parallel execution. This volume contains the proceedings of a seminar and workshop organised by the Esprit Basic Research Action Phoenix in collaboration with the Esprit Basic Research Action Integration. Both these groups have been closely involved in investigating the foundations of declarative programming and the integration of various language paradigms, as well as the developing aspects of related technology. The main aim of the seminar and workshop was to provide a forum for the results of this work, together with contributions from other researchers in the same field. These papers cover a variety of important technical areas such as foundations and languages, program transformation and analysis, integrated approaches, implementation techniques, abstract machines and programming methodology. The resulting volume provides an in-depth picture of current research into declarative programming. It will be of special interest to researchers in programming languages and methodology, students of artificial intelligence and anyone involved in industrial research and development.