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Trijections: Sometimes 3 is greater than 2

We prove two combinatorial identities using "trijections"--equivalence classes with size three--rather than standard "bijective" counting arguments.

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5.13 Overall score*

78 Rank

24 Votes

3 Comments

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7.7

Very interesting topic that for me was unknown.

amazing uniqueness of topic, though the concepts and the importance/novelty factor i wasnt sure about by the end. lovely presentation style :)

4.4

It was hard to follow, perhaps going too fast in some spots. Since the proofs were of formulas that are not common, or pretty specialized, then I wasn't convinced that thinking in trijections was going to be very powerful. Very nice animations and audio! You have a very nice voice to listen to.