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The Verified Incremental Design of a Distributed Spanning Tree Algorithm: Extended Abstract

Published: 01 September 1999 Publication History

Abstract.

The paper announces an incremental mechanically–verified design of the algorithm of Gallager, Humblet, and Spira for the distributed determination of the minimum-weight spanning tree in a graph of processes. The processes communicate by means of asynchronous messages with their neighbours in the graph. Messages over one link may pass each other. The proof of the algorithm is based on ghost variables, invariants, and a decreasing variant function. The verification is mechanized by means of the theorem prover Nqthm of Boyer and Moore. This extended abstract is an introduction to the full paper that can be obtained by ftp (http://link.springer.de/link/service/journals/00165/).

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            cover image Formal Aspects of Computing
            Formal Aspects of Computing  Volume 11, Issue 1
            Sep 1999
            105 pages
            ISSN:0934-5043
            EISSN:1433-299X
            Issue’s Table of Contents

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            Springer-Verlag

            Berlin, Heidelberg

            Publication History

            Published: 01 September 1999
            Published in FAC Volume 11, Issue 1

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            1. Keywords: Minimum spanning tree; Message passing; Asynchronous communication; Theorem proving

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