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*From*: Markus Kuppe <tlaplus-google-group@xxxxxxxxxxx>*Date*: Fri, 20 Oct 2023 15:32:31 -0700*References*: <ab74ce7f-2f9b-4156-85ca-a14121013612n@googlegroups.com> <1bb431f8-4dd8-4e1e-ac6a-e6e573fa5a74n@googlegroups.com>

It's possible that a view (compare section 14.3.3, p. 243ff, Specifying Systems) can achieve the same results without changing the Spec. M. > On Oct 20, 2023, at 1:54 PM, Jones Martins <jonesmvc@xxxxxxxxx> wrote: > > [...] > The community module SequencesExt contains a IsSuffix(_) operator. Every action that changes the log would be written like AddOne: > EquivalentSuffixes == { <<"+1", "-1">>, <<"-1", "+1">>, <<"+1", "-1", "div2", "-1">> } AppendToLog(log, event) == LET newLog == log \o <<event>> IN IF \E suffix \in EquivalentSuffixes: IsSuffix(suffix, newLog) THEN log ELSE newLog AddOne == /\ x' = x + 1 /\ log' = AppendToLog(log, "+1") > By compressing log, the state space would contain a subset of possible logs, which might be a problem… > I haven’t tested any of this, by the way, but I’m curious to know if there are any other solutions. -- You received this message because you are subscribed to the Google Groups "tlaplus" group. To unsubscribe from this group and stop receiving emails from it, send an email to tlaplus+unsubscribe@xxxxxxxxxxxxxxxx. To view this discussion on the web visit https://groups.google.com/d/msgid/tlaplus/4019A0DE-670B-430C-86D0-DED53827DFA4%40lemmster.de.

**References**:**[tlaplus] Strategies for scalable modeling of append-only logs***From:*Andrew Helwer

**[tlaplus] Re: Strategies for scalable modeling of append-only logs***From:*Jones Martins

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