Tricki

a repository of mathematical know-how

- Existence proofs
- Extremal combinatorics front page
- Finding small nets
- If a parameter is generating undesirable boundary terms, try averaging over many choices of that parameter
- If you are getting stuck, then try to prove rigorously that your approach cannot work
- Probabilistic combinatorics front page
- Some useful examples of graphs
- Techniques for counting
- What can a lower bound say about potential proofs of the upper bound?

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