Commit be408850 authored by Alexandre Duret-Lutz's avatar Alexandre Duret-Lutz
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* doc/org/ltlfilt.org: Update description of --stutter-invariant.

parent e900488e
......@@ -327,10 +327,7 @@ ltlfilt -f 'F(a & X(!a & Gb))' --remove-x | ltlfilt --equivalent-to 'F(a & X(!a
#+RESULTS:
: F(a & ((a & (a U (!a & Gb)) & ((!b U !a) | (b U !a))) | (!a & (!a U (a & !a & Gb)) & ((!b U a) | (b U a))) | (b & (b U (!a & Gb & !b)) & ((!a U !b) | (a U !b))) | (!b & (!b U (!a & b & Gb)) & ((!a U b) | (a U b))) | (!a & Gb & (G!a | Ga) & (Gb | G!b))))
It is therefore equivalent, but that is not a surprise since the
=--stutter-invariant= filter is actually implemented using exactly
[[http://homepages.inf.ed.ac.uk/kousha/note_on_stut_tl_lpi.ps][this procedure]] (calling the =remove_x()= function, and building automata
to check the equivalence of the resulting formula with the original one).
It is therefore equivalent (otherwise the output would have been empty).
* Using =--format=
......
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