Paper Errata

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Paper Errata
DatePage/Linechanges
05/28/2010 Page 14:19 line 1 sync (just.elves.a, just.elves.b) -- wait for two other elves

should be

sync (just.elves.a!, just.elves.b!) -- wait for two other elves

Explanation: the sync procedure takes in channel-ends, not entire channels,
so we must specify which end of the channel we are passing.