Re: [tlaplus] A problem in expressing a step

[Leslie Lamport <tlaplus.ll@xxxxxxxxx>]

   U' = IF Predicate(u) THEN (U \ {u}) \cup {termUpdate(u)}
                        ELSE (U \ {u}) \cup {denUpdate(u)}

can be written a bit more simply as

   U' = (U \ {u}) \cup IF Predicate(u) THEN {termUpdate(u)}
                                       ELSE {denUpdate(u)}

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