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From: Mild Shock <janburse@fastmail.fm>
Newsgroups: comp.lang.prolog
Subject: =?UTF-8?Q?Fathers_of_Bisimulation:_Robin_Milner_=281934=e2=80=93201?=
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Date: Mon, 21 Jul 2025 14:28:26 +0200
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Hi,

Despite these efforts:

The development of concurrent logic programming
was given an impetus when Guarded Horn Clause was
used to implement KL1, the systems programming
language of the Japanese Fifth Generation
Project (FGCS). The FGCS Project was a $400M
initiative by Japan's Ministry of International
Trade and Industry, begun in 1982, to use
massively parallel computing/processing for
artificial intelligence applications.
https://en.wikipedia.org/wiki/Concurrent_logic_programming

And relation ship to rational trees, in
Alain Colmerauers WINDOW PRINCIPLE, mostlikely
Bisimulation has a more lasting impact.

But who were the founding fathers of bisimulation?

Robin Milner (1934–2010)
Primary founder of the concept of bisimulation. Introduced
the idea in the context of Calculus of Communicating
Systems (CCS) in the late 1970s and early 1980s. Bisimulation
became central to his work on concurrency theory. He won
the Turing Award in 1991, partly for this work.

Gordon Plotkin
While not the originator of bisimulation itself,
Plotkin worked closely with Milner and contributed
significantly to the theoretical foundations of
operational semantics and domain theory, which
intersect with bisimulation.

David Park
Credited with influencing the notion of bisimulation.
His unpublished manuscript (c. 1981) and personal
communications inspired Milner’s formalization.
He clarified the distinction between simulation
and bisimulation.

Bye