## Seminars and Colloquium

#### Zhouping XIN (The Chinese University of Hong Kong)PDE Seminar

On Subsonic Flows Around A Profile With A Vortex Line

#### Chang-Yeon Chough (QSMS Seoul National University)Algebraic Geometry

Introduction to infinity-categories IV

#### Olaf Wolkenhauer (University of Rostock, Germany)Math Biology

[BIMAG Colloquium] Advice to my younger self

#### Chang-Yeon Chough (QSMS Seoul National University)Algebraic Geometry

Introduction to infinity-categories V

#### Lee, Young Ju (Texas State Univ.)Computational Math Seminar

An Image inpainting via a constrained smoothing and dynamic mode decomposition

#### Jinsu Kim (UC Irvine)Math Biology

[BIMAG Seminar] What is the role of oscillatory signals in intracellular systems?

#### Hong Liu (University of Warwick)Colloquium

Sublinear expander and embeddings sparse graphs

## Conferences and Workshops

## Student News

“Miwon Du-Myeong Scholarship” expanded to the Dept. of Mathematical Sciences 2020.06

Best Teaching Assistant Awards in Fall 2019 2020.01

Jongwon Lee won Simon Marais Mathematics Competition 2019 2019.12

Results of the College Mathematics Competition 2019 2019.12

Hyukpyo Hong Chosen for Global PhD Fellowship 2019 by the National Research Foundation of Korea 2019.10

Best TA Awards for Spring 2019 2019.06

Minyoo Kim Takes 2019 KSIAM Poster Award 2019.06

2019 Spring POW (Problem of the Week) Award Winners 2019.06

KAIST Students Receive Prizes from the 2018 Simon Marias Mathematics Competition 2018.12

Winners of the 2018 Fall Semester Problem of the Week Award 2018.12

## Bookmarks

## Bulletin Boards

학부생 수학과외 구합니다. | 07. 01 | |

고페이 수학강사 모십니다. | 08. 11 | |

중3 수학 과외 선생님 모십니다. | 04. 06 | |

여학생 과외 원합니다. | 03. 07 | |

고교2학년생입니다. 수학선생님 원해요 | 11. 11 | |

대학원 입시 설명회 자료 좀 올려주시겠어요? | 06. 22 | |

모듈 형식과 타원 방정식에 대해서 질문합니다 | 11. 13 |

## Alumni News

## Problem of the week

Let \(\mathcal{A}_n\) be the collection of all sequences \( \mathbf{a}= (a_1,\dots, a_n) \) with \(a_i \in [i]\) for all \(i\in [n]=\{1,2,\dots, n\}\). A nondecreasing \(k\)-subsequence of \(\mathbf{a}\) is a subsequence \( (a_{i_1}, a_{i_2},\dots, a_{i_k}) \) such that \(i_1< i_2< \dots < i_k\) and \(a_{i_1}\leq a_{i_2}\leq \dots \leq a_{i_k}\). For given \(k\), determine the smallest \(n\) such that any sequence \(\mathbf{a}\in \mathcal{A}_n\) has a nondecreasing \(k\)-subsequence.