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*From*: Saksham Chand <schand@xxxxxxxxxxxxxxxxx>*Date*: Thu, 29 Aug 2019 13:41:37 -0400*References*: <c3224133-5b5b-4e28-9300-cd4b7f8ac083@googlegroups.com>

Types are missing (see the bold below).

` <2>3c. \A Q \in Quorum: \E a \in Q : maxVBal[a] \geq 0 BY <2>3a, <2>3b `**DEF TypeOK, Ballots**

Thanks,Saksham

On Thu, Aug 29, 2019 at 1:23 PM Saswata Paul <paulsaswata1@xxxxxxxxx> wrote:

Hi,--I have been working on a proof using TLAPS, but I seem to be stuck at a simple step which should be very obvious.So the following is a snippet from my proof :

<2>3a. \A Q \in Quorum: \E a \in Q : maxVBal[a] \geq bOMITTED<2>3b. b \geq 0OMITTED<2>3c. \A Q \in Quorum: \E a \in Q : maxVBal[a] \geq 0BY <2>3a, <2>3bThe BY proof for step <2>3c is not going through.

Shouldn't <2>3c be a simple logical consequence of <2>3a and <2>3b ? (Unless I am making an extremely silly error)Is there a syntax/semantic error that is preventing the proof from going through or is it some limitation of the back end solvers that requires this simple proof to be broken even further?Thank you

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**Follow-Ups**:**Re: [tlaplus] Stuck on an obvious proof [TLAPS]***From:*Saswata Paul

**References**:**[tlaplus] Stuck on an obvious proof [TLAPS]***From:*Saswata Paul

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