It will also be an interesting exercise or even project to work on the probability of random people sharing genealogy up to a certain amount of time. Are all the U.S. Presidents related to each other? by Brian Roemmele https://www.quora.com/Are-all-the-U-S-Presidents-related-to-each-other/answer/Brian-Roemmele?srid=2GFd&share=58fef9f8

Tag: Probability

# 7 Shuffles is Enough

A famous result by our mathemagician Persi Diaconis: 7 shuffles is enough. Put it in everyday words, to randomize one set of Poker cards, you need to (Riffle) shuffle at least 7 times. *Side note: according to this lecture notes, the interpretation is not correct. To completely randomize the deck, you need 11 or more. … Continue reading 7 Shuffles is Enough

# Non-Measuable Ghost: Persi’s Halloween Talk

It was a ghostful Monday--a Monday full of non-measurable ghosts. You've probably heard of this one sphere cut into five pieces becomes two spheres story. This Monday Professor Persi Diaconis gave a public Halloween lecture about these ghosts. I would love to share an amazing proof that shows 0.5=0.99 or 0.999 or 0.9999. Well, with … Continue reading Non-Measuable Ghost: Persi’s Halloween Talk