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## Revision as of 00:37, 23 January 2020

For the site in Spanish, visit Math Circle de Madison

## Contents

# What is a Math Circle?

The Madison Math Circle is a weekly series of mathematically based activities aimed at interested middle school and high school students. It is an outreach program organized by the UW Math Department. Our goal is to provide a taste of exciting ideas in math and science. In the past we've had talks about plasma and weather in outer space, video game graphics, and encryption. In the sessions, students (and parents) are often asked to explore problems on their own, with the presenter facilitating a discussion. The talks are independent of one another, so new students are welcome at any point.

The level of the audience varies quite widely, including a mix of middle school and high school students, and the speakers generally address this by considering subjects that will be interesting for a wide range of students.

After each talk we'll have pizza provided by the Mathematics Department, and students will have an opportunity to mingle and chat with the speaker and with other participants, to ask questions about some of the topics that have been discussed, and also about college, careers in science, etc.

**The Madison Math circle was featured in Wisconsin State Journal:** check it out!

# All right, I want to come!

We have a weekly meeting, **Monday at 6pm in 3255 Helen C White Library**, during the school year. **New students are welcome at any point! ** There is no fee and the talks are independent of one another, so you can just show up any week, but we ask all participants to take a moment to register by following the link below:

Math Circle Registration Form

All of your information is kept private, and is only used by the Madison Math Circle organizer to help run the Circle.

If you are a student, we hope you will tell other interested students about these talks, and speak with your parents or with your teacher about organizing a car pool to the UW campus. If you are a parent or a teacher, we hope you'll tell your students about these talks and organize a car pool to the UW (all talks take place in 3255 Helen C White Library, on the UW-Madison campus, right next to the Memorial Union).

## Directions and parking

Our meetings are held on the 3rd floor of Helen C. White Hall in room 3255.

**Parking.** Parking on campus is rather limited. Here is as list of some options:

- There is a parking garage in the basement of Helen C. White, with an hourly rate. Enter from Park Street.
- A 0.5 mile walk to Helen C. White Hall via these directions, many spots (
**free starting 4:30pm**) in Lot 26 along Observatory Drive. - A 0.3 mile walk to Helen C. White Hall via these directions, many spots (
**free starting 4:30pm**) in Lot 34. - A 0.3 mile walk to Helen C. White Hall via these directions, 2 metered spots (25 minute max) in front of Lathrop Hall.
- A 0.2 mile walk to Helen C. White Hall via these directions 6 metered spots (25 minute max) around the loop in front of Chadbourne Hall .
- For more information, see the UW-Madison Parking Info website.

## Email list

The best way to keep up to date with the what is going is by signing up for our email list. Send an empty email to join-mathcircle@lists.wisc.edu

## Contact the organizers

The Madison Math Circle is organized by a group of professors and graduate students from the Department of Mathematics at the UW-Madison. If you have any questions, suggestions for topics, or so on, just email the **organizers** here. We are always interested in feedback!

## Donations

Please consider donating to the Madison Math Circle. As noted in our annual report, our main costs consist of pizza and occasional supplies for the speakers. So far our costs have been covered by donations from the UW Mathematics Department as well as a generous gifts from a private donor. But our costs are rising, primarily because this year we expect to hold more meetings than in any previous year. In fact, this year, we expect to spend at least $2500 on pizza and supplies alone.

So please consider donating to support your math circle! The easiest way to donate is to go to the link:

There are instructions on that page for donating to the Math Department. ** Be sure and add a Gift Note saying that the donation is intended for the "Madison Math Circle"!** The money goes into the Mathematics Department Annual Fund and is routed through the University of Wisconsin Foundation, which is convenient for record-keeping, etc.

Alternately, you can bring a check to one of the Math Circle Meetings. If you write a check, be sure to make it payable to the "WFAA" and add the note "Math Circle Donation" on the check.

Or you can just pay in cash, and we'll give you a receipt.

## Help us grow!

If you like Math Circle, please help us continue to grow! Students, parents, and teachers can help by:

- Posting our
**flyer**at schools or anywhere that might have interested students - Discussing the Math Circle with students, parents, teachers, administrators, and others
- Making an announcement about Math Circle at PTO meetings
- Donating to Math Circle

Contact the organizers if you have questions or your own ideas about how to help out.

# Meetings for Fall 2019

Talks start at **6pm in room 3255 of Helen C. White Library**, unless otherwise noted.

Fall 2019 | ||
---|---|---|

Date | Speaker | Topic |

September 23, 2019 | Soumya Sankar | Why don't map makers like high heels? |

September 30, 2019 | Erika Pirnes | Why do ice hockey players fall in love with mathematicians? |

October 7, 2019 | Uri Andrews | Self-reference, proofs, and computer programming |

October 14, 2019 | James Hanson | When is a puzzle impossible? |

October 21, 2019 | Owen Goff | Symbolic Logic and How It's Really Just Arithmetic |

October 28, 2019 | Ian Seong | Counting, but Not Like Kindergarteners |

November 4, 2019 | Omer Mermelstein | Ciphers: To Gibberish and Back Again |

November 11, 2019 | Colin Crowley | Many Pennies |

November 18, 2019 | Daniel Corey | The Königsberg Bridge Problem |

# Meetings for Spring 2020

Talks start at **6pm in room 3255 of Helen C. White Library**, unless otherwise noted.

Spring 2020 | ||
---|---|---|

Date | Speaker | Topic |

January 27, 2020 | Caitlyn Booms | Magic or Math? |

February 3, 2020 | TBD | TBD |

February 10, 2020 | TBD | TBD |

February 17, 2020 | TBD | TBD |

February 24, 2020 | TBD | TBD |

March 2, 2020 | TBD | TBD |

March 9, 2020 | TBD | TBD |

March 23, 2020 | TBD | TBD |

March 30, 2020 | TBD | TBD |

April 6, 2020 | TBD | TBD |

April 13, 2020 | TBD | TBD |

April 20, 2020 | TBD | TBD |

# Off-Site Meetings

We will hold some Math Circle meetings at local high schools on early release days. If you are interesting in having us come to your high school, please contact us!

Fall 2019 | ||||
---|---|---|---|---|

Date | Location | Speaker | Title | Abstract |

October 7, 2019 | 2:45pm East High | Solly Parenti | Tangled Up in Two | Every tangled cord you have ever encountered is secretly a number. Once you learn how to count these cords, cleaning your room will be as easy as 1-2-3. |

November 4, 2019 | 2:45pm James Madison Memorial | Caitlyn Booms | Sneaky Segments | We call a line segment drawn between two lattice points in the coordinate plane sneaky if it does not pass through any other lattice points. During this presentation, we will try to understand exactly when this happens, and we'll discuss how to calculate the probability that two randomly chosen lattice points are connected by a sneaky segment. |

November 11, 2019 | 2:45pm East High | Maya Banks | Tic-Tac-Topology | Tic-Tac-Toe is a game usually played on a flat piece of paper. In this standard setting, there is winning strategy--that is, if the player who goes first chooses their moves correctly, they will never lose. But we can also play Tic-Tac-Toe on a surface that isn't lying flat in a plane! In this talk, we will explore the game of Tic-Tac-Toe on cylinders, donuts, and even some wilder surfaces. We'll look for optimal strategies, and learn some topology in the process. |

December 16, 2019 | 2:45pm James Madison Memorial | Daniel Erman | Really Big Numbers | We will discuss the role that really really, really big numbers play in modern mathematics and in science. This will be a discussion of estimation and an introduction to some of the ways that mathematicians express unfathomably big numbers. |

Spring 2020 | ||||
---|---|---|---|---|

Date | Location | Speaker | Title | Abstract |

February 17, 2020 | 2:45pm James Madison Memorial | TBD | TBD | TBD |

March 9, 2020 | 2:45pm East High | TBD | TBD | TBD |

April 13, 2020 | 2:45pm James Madison Memorial | TBD | TBD | TBD |

April 20, 2020 | 2:45pm East High | TBD | TBD | TBD |

# Useful Resources

## Annual Reports

## Archived Abstracts

2015 - 2016 Math Circle Page (Spanish)