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Apr 16, 2019 at 2:33 vote accept David G. Stork
Apr 16, 2019 at 2:09 history edited Tony Huynh CC BY-SA 4.0
added 8 characters in body
Apr 16, 2019 at 2:02 history edited Tony Huynh CC BY-SA 4.0
added 288 characters in body
Apr 16, 2019 at 1:49 comment added David G. Stork OK. Thanks. Makes sense. (+1)... and await the full answer to both questions for a $\checkmark$.
Apr 16, 2019 at 1:47 comment added Tony Huynh I am counting 4-tuples that cannot occur, so $e$ is $b, c$, or $d$.
S Apr 16, 2019 at 1:45 history suggested David G. Stork CC BY-SA 4.0
Simplified the first equation
Apr 16, 2019 at 0:41 review Suggested edits
S Apr 16, 2019 at 1:45
Apr 16, 2019 at 0:15 comment added David G. Stork Thanks... but I'm a little confused by your answer. Could you explain why in your last sentence this issue is the "unique ordering $(b,c,d)$ of $\{x,y,e\}$"? As you rightly point out, $e$ can never be in the exposed 4-tuple, so the ordering of it among $(b,c,d)$ seems inappropriate.
Apr 15, 2019 at 23:16 history edited Tony Huynh CC BY-SA 4.0
deleted 3 characters in body
Apr 15, 2019 at 23:10 history answered Tony Huynh CC BY-SA 4.0