top of page


My notes used to train the Mexican Mathematical Olympiad were published in Spanish and English.  They contain the tools needed to solve any combinatorics problem from a mathematical olympiad.


  • "Gerrymandering, Sandwiches, and topology"  Notices of the AMS 64(9) pp.1010-1013.

The notices article was highlighted in "october's spotlight" of the AMS math grad blog.

Using Ham Sandwich cuts to gerrymander

I was recently made aware of a similar application of fair partition results to gerrymandering by Macarthan Humphreys.  His paper (which also has more references on the subject) can be found here.

  • "El principio de las casillas" (in Spanish, "the pigeonhole principle").  Tzaloa 2010 (2) pp. 1-6

bottom of page