Hi people! Sorry by this not interesting post! I just want help to find a problem. I saw this problem but didn't add to my "solve later folder". Well, it is just a double sum of 1/(m+n)! from m,n=1 to infty. I saw it a week ago and did not find it anymore.

Thanks!

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TopNewestIf you looked at a problem then you can go to https://brilliant.org/problems/started/ and go back through the list of problems available there to find it. Best of luck!

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