학과 세미나 및 콜로퀴엄
변순식 (Seoul National University)콜로퀴엄
Optimal regularity theory for degenerate partial differential equations
이제학 (KAIST)기타
Introduction to étale cohomology 2
김지수 (서울대학교)기타
Statistical Inference For Geometric and Topological Data
강성경 (University of Oxford)위상수학 세미나
Bordered Floer homology and the invariant splitting principle
Jerry Bona (University of Illinois Chicago)콜로퀴엄
Theory and Application of Water Wave Models
대학원생 세미나
SAARC 세미나
편미분방정식 통합연구실 세미나
IBS-KAIST 세미나
학술회의 및 워크샵
학생 뉴스
북마크
Research Highlights
게시판
동문 뉴스
Problem of the week
A permutation \(\phi \colon \{ 1,2, \ldots, n \} \to \{ 1,2, \ldots, n \}\) is called a well-mixed if \(\phi (\{1,2, \ldots, k \}) \neq \{1,2, \ldots, k \}\) for each \(k<n\). What is the number of well-mixed permutations of \(\{ 1,2, \ldots, 15 \}\)?