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Jul 30, 2020 at 18:19 answer added D.S. Lipham timeline score: 4
Jul 30, 2020 at 10:29 comment added Yee Neil sorry for the confuse, actually, I want to express that $x\in A$ and $y\in B$.
Jul 30, 2020 at 10:28 history edited Yee Neil CC BY-SA 4.0
deleted 36 characters in body
Jul 30, 2020 at 10:09 comment added Geva Yashfe Can you clarify whether we can assume $x\in A$ and $y\in B$? Or is it only that a partition $A\cup B$ of $P\setminus C$ exists, and $x,y$ might both be in $A$?
Jul 30, 2020 at 9:15 history edited Yee Neil CC BY-SA 4.0
added 93 characters in body
Jul 30, 2020 at 7:29 answer added Fedor Petrov timeline score: 4
Jul 30, 2020 at 6:46 history edited leo monsaingeon CC BY-SA 4.0
slightly rephrased for clarity, fixed grammar/typo issues
Jul 30, 2020 at 6:22 history asked Yee Neil CC BY-SA 4.0