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nLab > Latest Changes: Concurrency

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    • CommentRowNumber1.
    • CommentAuthorTim_Porter
    • CommentTimeNov 5th 2012

    A query about the new entry on copncurrency theory: Does ‘simultaneously’ make sense if there is no global clock?

    If not, then the situation gets a lot more like some models for spacetime and the idea of slices through some evolving state space might be a good model.

    • CommentRowNumber2.
    • CommentAuthorUrs
    • CommentTimeNov 5th 2012

    Bob Harper has a blog post

    where he explains a bit how to think of this conceptually…

    … and in particular it seems that he suggests that your entry concurrency should instead be titled parallelism. But I’ll leave that to the experts.

    • CommentRowNumber3.
    • CommentAuthorStephan A Spahn
    • CommentTimeNov 6th 2012
    • (edited Nov 6th 2012)

    In german (Duden) “simultan” can mean just “joint” without any reference to time . In english (Oxford Dictionaries) however the relation to time seems to be stronger. Curiously Duden gives another etymology: simul (latin)->similar which the Oxford Dictionaries do not know.

    I did not read that blog post, but since “parallels do not interact” and concurrent processes perhaps do, the statement in the blog’s title seems to be plausible - but I do not see why this implies that the article should be named “parallelism”.

    The sentence in question was mainly inspired by wikipedia and was just a side remark for me; so

    But I’ll leave that to the experts.

    holds for me, too.

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