Post without words #18

Posted on May 31, 2017 by Brent

About Brent

Associate Professor of Computer Science at Hendrix College. Functional programmer, mathematician, teacher, pianist, follower of Jesus.
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5 Responses to Post without words #18

  1. Prabhakar says:
    May 31, 2017 at 10:51 pm

    That is one of the most beautiful descriptions of the Inclusion Exclusion Principle I’ve ever seen!

  2. Per Persson says:
    June 1, 2017 at 3:16 am

    Venn diagrams for bags.

  3. Oscar Cunningham says:
    June 1, 2017 at 3:18 am

    This is also the binomial expansion of 0 = (1-1)^n

  4. Thibault Vroonhove says:
    June 1, 2017 at 6:18 am

    Really neat ! P\left(\bigcup_{i=1}^n A_i \right) = \sum_{k=1}^n (-1)^{k-1} \sum_{1\leq i_1 < \dots < i_k\leq n} P\left(\bigcap_{j=1}^k A_{i_j}\right)

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