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When Is Partial Trace Equivalence Adequate?

Author
Bloom, Bard
Abstract
Two processes are partial trace equivalent if they can perform the same sequences of actions in isolation. Partial trace equivalence is perhaps the simplest possible notion of process equivalence. In general, it is too simple: it is not usually an adequate semantics. We investigate the circumstances under which it is adequate, which are surprisingly rich. We give two substantial classes of language for which partial traces are adequate. In one class, partial trace equivalence suffices for total correctness, and operations such as true sequencing are possible: but all processes are determinate and silent moves are not possible. The other class admits indeterminacy and silent moves, but partial traces only suffice for partial correctness and true sequencing is not definable.
Date Issued
1991-07Publisher
Cornell University
Subject
computer science; technical report
Previously Published As
http://techreports.library.cornell.edu:8081/Dienst/UI/1.0/Display/cul.cs/TR91-1218
Type
technical report