Department Seminars and Colloquium
Sun-Sig Byun (Seoul National University)Colloquium
Optimal regularity theory for degenerate partial differential equations
Jaehak Lee (KAIST)Etc.
Introduction to étale cohomology 2
Jisu Kim (Seoul National University)Etc.
Statistical Inference For Geometric and Topological Data
Sungkyung Kang (University of Oxford)Topology Seminar
Bordered Floer homology and the invariant splitting principle
Jerry Bona (University of Illinois Chicago)Colloquium
Theory and Application of Water Wave Models
Graduate Seminars
SAARC Seminars
PDE Seminars
IBS-KAIST Seminars
Conferences and Workshops
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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 \(\{ 1,2, \ldots, 15 \}\)?
KAIST Compass Biannual Research Webzine
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 \(\{ 1,2, \ldots, 15 \}\)?