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Re: Parsing Error in Consensus.tla

On Monday, June 23, 2014 at 3:59:50 PM UTC-7 I corrected my earlier email and wrote that the formula should be

   <2>1. Inv /\ [][Next]_vars => []Inv

The formula you are looking for is the statement of LEMMA InductiveInvariance.


On Friday, July 1, 2016 at 12:55:05 AM UTC-7, kaie wrote:

On Tuesday, June 24, 2014 at 5:44:33 AM UTC+10, Leslie Lamport wrote:


The [] in the formula is spurious, and it should read

   <2>1. Inv /\ [Next]_vars => Inv

Not sure why it's missing but I believe there ought to be prime at the very end:

   <2>1. Inv /\ [Next]_vars => Inv'

to make it interesting (and sufficiently strong for the following invariant proof).