What a lower bound can say about the proof of the upper bound

When does reformulating a problem count as progress?

If you are getting stuck, then try to prove rigorously that your approach cannot work

"Think about the converse" should be added as a link in this article.

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## "Think about the converse"

Tue, 09/02/2010 - 21:53 — Anonymous (not verified)"Think about the converse" should be added as a link in this article.