# A Proof of a Leader Election Protocol in microCRL ($\mu$CRL)

Authors
Publisher
Swedish Institute of Computer Science
Publication Date
Disciplines
• Computer Science
• Mathematics

## Abstract

In 1982 Dolev, Klawe & Rodeh presented an O(n log n) unidirectional distributed algorithm for the circular extrema-finding (or leader-election) problem}. At the same time Peterson came up with a nearly identical solution. In this paper, we bring the correctness of this algorithm to a completely formal level. This relatively small protocol, which can be described on half a page, requires a rather involved proof for guaranteeing that it behaves well in all possible circumstances. To our knowledge, this is one of the more advanced case-studies in formal verification based on process algebra.

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