ELAN

REM (Reduce Elan Machine): Core of the New ELAN Compiler

ELAN is a powerful language and environment for specifying and prototyping deduction systems in a language based on rewrite rules controlled by strategies. It offers a natural and simple logical framework for the combination of the computation and deduction paradigms. It supports the design of theorem provers, logic programming languages, constraint solvers and decision procedures. ELAN takes f...

Input/Output for ELAN

We show how to add Input/Output capabilities to the ELAN rewriting interpreter using a rewrite speciication of-calculus. This I/O system has the advantage of being totally explicit and t in the same semantic framework than any other \application program". An actual implementation shows the eeectiveness of this approach.

Elan Drc Ii

Specifying Authentication Protocols Using ELAN

The Needham-Schroeder public-key protocol [NS78] has been already analyzed using several methodologies from model-checkers like FDR [Ros94] to approaches based on theorem proving like NRL [Mea96]. Although this protocol is simple it has been proved insecure only in 1995 by G. Lowe [Low95]. After the discover of the security problem and the correctness proof of a modified version in [Low96] seve...

Elan vital chez Bergson

La Philosphie de Bergson vise la vie spirituelle, le spiritualisme, la joie, l’appétit et le changement perpétuel de la réalité. En conséquence las trios notions de la durée, de la mémoire et de l’élan vital constituent la réalité de la vie dans son cheminement et dans son progrès. L’ensemble de ces notions fondamentales décèle la contenu de la vie, et dégage la réalité de ses rigidités de l’au...