Tag Archives: Probability

Oz’ Balls Problem: The Solution

Posted on May 17, 2013 by Gil Kalai

A commentator named Oz proposed the following question: You have a box with n red balls and n blue balls. You take out each time a ball at random but, if the ball was red, you put it back in the box and take out … Continue reading →

Posted in Probability, Test your intuition | Tagged , , , | 1 Comment

Taking balls away: Oz’ Version

Posted on April 27, 2013 by Gil Kalai

This post is based on a comment by Oz to our question about balls with two colors: “There is an interesting (and more difficult) variation I once heard but can’t recall where: You have a box with n red balls … Continue reading →

Posted in Guest blogger, Probability, Test your intuition | Tagged , , | 14 Comments

Answer to test your intuition (18)

Posted on April 23, 2013 by Gil Kalai

You have a box with n red balls and n blue balls. You take out balls one by one at random until left only with balls of the same color. How many balls will be left (as a function of n)? … Continue reading →

Posted in Probability, Test your intuition | Tagged , , , , | 3 Comments

Midrasha Talks are Now Online

Posted on March 21, 2010 by Gil Kalai

Itai Benjamini listening to Gadi Kozma There are 41 lectures from the Midrasha on Probability and Geometry: The Mathematics of Oded Schramm which are now online. Joram Lindenstrauss’s concluding lecture (click on the picture to see) Laci Lovasz More pictures … Continue reading →

Posted in Combinatorics, Conferences, Probability | Tagged , , | 4 Comments

Itamar Pitowsky: Probability in Physics, Where does it Come From?

Posted on February 15, 2010 by Gil Kalai

I came across a videotaped lecture by Itamar Pitowsky given at PITP some years ago on the question of probability in physics that we discussed in two earlier posts on randomness in nature (I, II). There are links below to … Continue reading →

Posted in Obituary, Philosophy, Physics, Probability | Tagged , , , | 2 Comments

Geometry and Probability

Posted on August 30, 2009 by Gil Kalai

   

Posted in Conferences, Probability | Tagged , , | 4 Comments

A Problem on Planar Percolation

Posted on April 25, 2009 by Gil Kalai

Conjecture (Gady Kozma):  Prove that the critical probability for planar percolation on a Cayley graph of the group is always an algebraic number. Gady  mentioned this conjecture in his talk here about percolation on infinite Cayley graphs.  (Update April 30: Today Gady mentioned … Continue reading →

Posted in Open problems, Probability | Tagged , | 1 Comment