# AMS Student Chapter Seminar: Difference between revisions

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The AMS Student Chapter Seminar (aka Donut Seminar) is an informal, graduate student seminar on a wide range of mathematical topics. Pastries (usually donuts) will be provided. | The AMS Student Chapter Seminar (aka Donut Seminar) is an informal, graduate student seminar on a wide range of mathematical topics. The goal of the seminar is to promote community building and give graduate students an opportunity to communicate fun, accessible math to their peers in a stress-free (but not sugar-free) environment. Pastries (usually donuts) will be provided. | ||

* '''When:''' Wednesdays, 3: | * '''When:''' Wednesdays, 3:30 PM – 4:00 PM | ||

* '''Where:''' Van Vleck, 9th floor lounge (unless otherwise announced) | * '''Where:''' Van Vleck, 9th floor lounge (unless otherwise announced) | ||

* '''Organizers:''' [https:// | * '''Organizers:''' [https://people.math.wisc.edu/~ywu495/ Yandi Wu], Maya Banks | ||

Everyone is welcome to give a talk. To sign up, please contact one of the organizers with a title and abstract. Talks are 25 minutes long and should avoid assuming significant mathematical background beyond first-year graduate courses. | Everyone is welcome to give a talk. To sign up, please contact one of the organizers with a title and abstract. Talks are 25 minutes long and should avoid assuming significant mathematical background beyond first-year graduate courses. | ||

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The schedule of talks from past semesters can be found [[AMS Student Chapter Seminar, previous semesters|here]]. | The schedule of talks from past semesters can be found [[AMS Student Chapter Seminar, previous semesters|here]]. | ||

== | == Fall 2021 == | ||

=== | === September 29, John Cobb === | ||

Title: | Title: Rooms on a Sphere | ||

Abstract: | Abstract: A classic combinatorial lemma becomes very simple to state and prove when on the surface of a sphere, leading to easy constructive proofs of some other well known theorems. | ||

=== | === October 6, Karan Srivastava === | ||

Title: | Title: An 'almost impossible' puzzle and group theory | ||

Abstract: | Abstract: You're given a chessboard with a randomly oriented coin on every square and a key hidden under one of them; player one knows where the key is and flips a single coin; player 2, using only the information of the new coin arrangement must determine where the key is. Is there a winning strategy? In this talk, we will explore this classic puzzle in a more generalized context, with n squares and d sided dice on every square. We'll see when the game is solvable and in doing so, see how the answer relies on group theory and the existence of certain groups. | ||

=== | === October 13, John Yin === | ||

Title: | Title: TBA | ||

Abstract: | Abstract: TBA | ||

=== | === October 20, Varun Gudibanda === | ||

Title: | Title: TBA | ||

Abstract: | Abstract: TBA | ||

=== | === October 27, Andrew Krenz === | ||

Title: The 3-sphere via the Hopf fibration | |||

Abstract: The Hopf fibration is a map from $S^3$ to $S^2$. The preimage (or fiber) of every point under this map is a copy of $S^1$. In this talk I will explain exactly how these circles “fit together” inside the 3-sphere. Along the way we’ll discover some other interesting facts in some hands-on demonstrations using paper and scissors. If there is time I hope to also relate our new understanding of $S^3$ to some other familiar models. | |||

=== | === November 3, TBA === | ||

Title: TBA | |||

Abstract: TBA | |||

=== November 10, TBA === | |||

Title: TBA | |||

Abstract: TBA | |||

=== November 17, TBA === | |||

Title: TBA | |||

Abstract: TBA | |||

=== November 24, TBA === | |||

Title: TBA | |||

Abstract: TBA | |||

=== December 1, TBA === | |||

Title: TBA | |||

Abstract: TBA | |||

=== December 8, TBA === | |||

Title: TBA | |||

Abstract: TBA | |||

Abstract: |

## Revision as of 20:39, 1 October 2021

The AMS Student Chapter Seminar (aka Donut Seminar) is an informal, graduate student seminar on a wide range of mathematical topics. The goal of the seminar is to promote community building and give graduate students an opportunity to communicate fun, accessible math to their peers in a stress-free (but not sugar-free) environment. Pastries (usually donuts) will be provided.

**When:**Wednesdays, 3:30 PM – 4:00 PM**Where:**Van Vleck, 9th floor lounge (unless otherwise announced)**Organizers:**Yandi Wu, Maya Banks

Everyone is welcome to give a talk. To sign up, please contact one of the organizers with a title and abstract. Talks are 25 minutes long and should avoid assuming significant mathematical background beyond first-year graduate courses.

The schedule of talks from past semesters can be found here.

## Fall 2021

### September 29, John Cobb

Title: Rooms on a Sphere

Abstract: A classic combinatorial lemma becomes very simple to state and prove when on the surface of a sphere, leading to easy constructive proofs of some other well known theorems.

### October 6, Karan Srivastava

Title: An 'almost impossible' puzzle and group theory

Abstract: You're given a chessboard with a randomly oriented coin on every square and a key hidden under one of them; player one knows where the key is and flips a single coin; player 2, using only the information of the new coin arrangement must determine where the key is. Is there a winning strategy? In this talk, we will explore this classic puzzle in a more generalized context, with n squares and d sided dice on every square. We'll see when the game is solvable and in doing so, see how the answer relies on group theory and the existence of certain groups.

### October 13, John Yin

Title: TBA

Abstract: TBA

### October 20, Varun Gudibanda

Title: TBA

Abstract: TBA

### October 27, Andrew Krenz

Title: The 3-sphere via the Hopf fibration

Abstract: The Hopf fibration is a map from $S^3$ to $S^2$. The preimage (or fiber) of every point under this map is a copy of $S^1$. In this talk I will explain exactly how these circles “fit together” inside the 3-sphere. Along the way we’ll discover some other interesting facts in some hands-on demonstrations using paper and scissors. If there is time I hope to also relate our new understanding of $S^3$ to some other familiar models.

### November 3, TBA

Title: TBA

Abstract: TBA

### November 10, TBA

Title: TBA

Abstract: TBA

### November 17, TBA

Title: TBA

Abstract: TBA

### November 24, TBA

Title: TBA

Abstract: TBA

### December 1, TBA

Title: TBA

Abstract: TBA

### December 8, TBA

Title: TBA

Abstract: TBA