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Jul 19, 2015 at 20:31 vote accept joaopa
Jul 19, 2015 at 20:16 vote accept joaopa
Jul 19, 2015 at 20:31
Jul 19, 2015 at 19:40 answer added Fedor Petrov timeline score: 4
Jul 19, 2015 at 13:09 comment added Jason Starr Here is a hint. There is a solution where both $X$ and $Y$ are constant in $t$. You can use that solution to find many other solutions in the usual way.
Jul 19, 2015 at 12:53 history asked joaopa CC BY-SA 3.0