# Math Circle Schedule

Archive of past schedules

## Spring 2024

### February 10, 2024

Time: 1pm-3pm

Location:
University of Oklahoma, Physical Sciences Center, Room 1105
601 Elm Ave, Norman, OK 73019.

Speaker: Deborah Moore-Russo

Title: Problems vs. Exercises

Abstract: We will consider the difference between mathematical exercises and problems by looking at some general principles put forward by Pólya. We will also consider why some solutions to problems might be more satisfactory, concluding with a problem that can be solved using nets and the Pythagorean Theorem.

Pictures:

### February 24, 2024

Time: 1pm-3pm

Location:
University of Oklahoma, Physical Sciences Center, Room 1105
601 Elm Ave, Norman, OK 73019.

Speaker: Mario Morán Cañón

Title: Fold It, Cut It, Boom! Shapes from One Snip!

Abstract: Have you ever cut out fancy snowflakes with intricate designs? What if you could do the same with just one snip? Fold your paper first, and it becomes possible! In this talk, we'll explore the art of folding and cutting to create various shapes: triangles, rectangles, stars, butterflies, ducks, and more. It might seem like magic, but it's all about symmetry!

Pictures:

For more on the fold-and-cut problem, written by one of the people who helped solve it, see this link.

### March 9, 2024

Time: 1pm-3pm

Location:
University of Oklahoma, Physical Sciences Center, Room 1105
601 Elm Ave, Norman, OK 73019.

Speaker: Peter Patzt

Title: Cutting and Pasting Shapes

Abstract: Given paper sheet, I can cut it into multiple pieces (with straight edges) and attach it back into another shape (with straight edges). Of course the area of the shape didn't change. But what kind of shapes can I produce this way? If time permits we will also consider the analogous problem in 3 dimensions.

Pictures:

### April 6, 2024

(Rescheduled, was previously goiong to be March 30).

Time: 1pm-3pm

Location:
University of Oklahoma, Physical Sciences Center, Room 323
601 Elm Ave, Norman, OK 73019.

Note that we are in a different room this week.

Speaker: Allen Wu

Title: The Kakeya Needle Problem

Abstract: Can you design a planar shape, which allows a thin needle of length 1 to make a full 360-turn in it, but which has as small an area as possible? In this talk, the participants will design their own shapes and compete for the minimal area! If time permits, we will describe a somewhat surprising resolution of this problem, and its unexpected connection to modern mathematics.

Pictures:

### April 20, 2024

(Rescheduled due to conflict with OSSM Math Compeition on April 13).

Time: 1pm-3pm

Location:
University of Oklahoma, Physical Sciences Center, Room 1105
601 Elm Ave, Norman, OK 73019.

Speaker: Alan Roche

Title: A Tour of Infinity

Abstract: Infinity is a strange and wonderful place. Through a series of puzzles, we'll explore some of its strangeness and some of its wonders.

Pictures:

### May 4, 2024

(Rescheduled, no longer on April 27).

Time: 1pm-3pm

Location:
University of Oklahoma, Physical Sciences Center, Room 1105
601 Elm Ave, Norman, OK 73019.