Date:  Speaker
Affiliation 
Topic  Notes 

September 15, 2010 
Linda Green
Dominican University 
Who left all those lockers open?  
September 22, 2010  Alon Amit 
Four Points, Two Distances  
September 29, 2010  Zvezdelina Stankova
Mills College 
Solving Problems in Plane Geometry 1: Reflection Does It! 

October 6, 2010  Linda Green
Dominican University 
Solving Problems in Plane Geometry 1.5: Reflect and Reflect Again 
Same handout as last time. 
October 13, 2010  Zvezdelina Stankova Mills College 
Solving Problems in Plane Geometry 2: Transformations In the Plane 

October 20, 2010  Paul Zeitz, University of San Francisco 
Mathematical Games  Homework: Problem 7 – Puppies and Kittens 
October 27, 2010  Paul Zeitz, University of San Francisco 
Mathematical Games, Part 2  Same handout as last time. 
November 3, 2010  Paul Zeitz, University of San Francisco 
Mathematical Games, Part 3  
November 10, 2010  Linda Green
Dominican University 
Math Auction  
November 17, 2010  —  AMC8 Math Contest  Practice Problems 
November 24, 2010  No Math Circle
Thanksgiving 

December 1, 2010  Joshua Zucker  The Mad Veterinarian and Other Invariants Part 1 
Things to think about for next time: Problem #9 — box splitting. Also problem #12 cup flipping — we talked about two and four cups, but what about other starting numbers of cups arranged in a circle? 
December 8, 2010  Joshua Zucker  The Mad Veterinarian and Other Invariants Part 2 

December 15, 2010  Ravi Vakil,
Stanford University 
The Unexpected Golden Mean in Mathematics and Nature 

January 12, 2011  Linda Green
Dominican University 
The Shape of Space Part 1
Tic Tac Toe on the Torus 

January 19, 2011  Linda Green
Dominican University 
The Shape of Space Part 2
Klein bottles and 3 dimensional spaces 

January 26, 2011  Linda Green
Dominican University 
The Shape of Space Part 3
Classification of surfaces 

February 2, 2011  Dave Auckly MSRI 
Spherical Triangles Take Flight Part 1 

Tuesday
January 8, 2011 
Meghan Peck Dominican University 
AMC10/12 Math Contest  Practice problems are on the AMC website. 
February 9, 2011  Dave Auckly MSRI 
Spherical Triangles Take Flight Part 2 

February 16, 2011  Linda Green
Dominican University 
Math Auction  
Tuesday, February 22, 2011  Bay Area Math Olympiad (BAMO)  Sample problems  
February 23, 2011  NO MATH CIRCLE
Ski Week 

March 2, 2011  Joshua Zucker  Graph Labeling and Digit Sums  
March 9, 2011  Joshua Zucker  Digit Sums and Other Adventures  
March 16, 2011  Ted Courant
Bentley School 
Dots and Boxes: a Game of DoubleCrosses  
March 23, 2011  Ted Courant
Bentley School 

March 30, 2011  Paul Zeitz
University of San Francisco 
Probability, Part 1  For next time, think about problems 4 (Love Triangle) and 5 (Die Throws) on page 2 of the handout, and problems 1 (Card Deck) and 10 (What a Loser!) on pages 2 and 4. (Also problem 12 — the St. Petersburg Paradox — looks fun.) 
April 6, 2011  Paul Zeitz
University of San Francisco 
Probability, Part 2  Simulation of the St. Petersburg Paradox 
April 13, 2011  NO MATH CIRCLE
Spring Break 

April 20, 2011  Linda Green Dominican University 
Pigeonhole Principle  
April 27, 2011  Maia Averett Mills College 
Mathematics of Doodling  
May 4, 2011  Alon Amit 
Graphs and Number Theory  
May 11, 2011  Dana Paquin
Stanford University 
Pick’s Theorem and Farey Sequences and Ford Circles  Two proofs of Pick’s Theorem 
May 18, 2011  Linda Green Dominican University 
A Math Dash with Themes from Number Theory 