Archive of posts with tag 'MitsuguHirasaka'

• 2014 KAIST CMC Discrete Math Workshop

  2014 KAIST CMC Discrete Math Workshop

  December 10–12, 2014

  자연과학동(E6-1), KAIST

  Preregistration in kcw2014.eventbrite.com deadline: Dec. 5 (Friday)

  ABSTRACTS

  Program (Dec.10 Wed-Room 1409)

  • 1:30-2:00 Registration
  • 2:00-2:30 Young Soo Kwon (권영수), Yeungnam University: A variation of list coloring and its properties
  • 2:40-3:10 Mitsugu Hirasaka, Pusan National University: Small topics on association schemes
  • 3:10-3:40 Coffee Break
  • 3:40-4:10 Younjin Kim (김연진),  KAIST: On Extremal Combinatorial Problems of Noga Alon
  • 4:20-4:50 Jang Soo Kim (김장수),  Sungkyunkwan University: A new q-Selberg integral, Schur functions, and Young books
  • 5:00-6:00 Discussion
  • 6:00- Dinner

  Program (Dec.11 Thurs-Room 1501 & 3435)

  • 10:30-12:00 CMC Intensive Lecture (Paul Seymour), Princeton University (Room 1501) :
  • 12:00-1:30 Lunch
  • 1:30-3:00 CMC Intensive Lecture (Maria Chudnovsky), Columbia University (Room 1501) :
  • 3:00-3:40 Coffee Break
  • 3:40-4:10 Suyoung Choi (최수영),  Ajou University (Room 3435): T.B.A.
  • 4:20-4:50 Jaehoon Kim (김재훈),  University of Birmingham (Room 3435): Regular subgraphs in uniform hypergraphs
  • 5:00-5:30 Ilkyoo Choi (최일규), KAIST (Room 3435): On choosability with separation of planar graphs with forbidden cycles
  • 6:00- Banquet

  Program (Dec.12 Fri-Room 1501)

  • 10:30-12:00 CMC Intensive Lecture (Paul Seymour), Princeton University :
  • 12:00-1:30 Lunch
  • 1:30-3:00 CMC Intensive Lecture (Maria Chudnovsky), Columbia University :
  • 3:00-3:30 Coffee Break
  • 3:30-4:30 Petr Hliněný,  Masaryk University: Planar graph emulators – Beyond planarity in the plane
  • 4:45-5:45 Discussion
  • 6:00- Dinner

  Tags:

  • MitsuguHirasaka
  • PetrHliněný
  • 권영수
  • 김연진
  • 김장수
  • 김재훈
  • 최수영
  • 최일규

• Mitsugu Hirasaka, Zeta functions of adjacecny algebras

  Zeta functions of adjacecny algebras

  Mitsugu Hirasaka
  Department of Mathematics,Pusan National University

  2013/03/29 Fri 4PM-5PM

  For a module L the formal Dirichlet series $\zeta$_L(s) = ∑_{n ≥ 1</i>}a_nn^-s is defined whenever the number a_n of submodules of L with index n is finite for each positive integer n. For a ring R and a finite association scheme (X,S) we denote the adjacency algebra of (X,S) over R by RS. In this talk we aim to compute $\zeta$_ZS(s) where $$ZS is regarded as a $$ZS-module under the assumption that $|X|$ is prime or $|S|=2$.</p>

  Tags:

  • MitsuguHirasaka

• Mitsugu Hirasaka, Finding n such that every transitive permutation group of degree n is multiplicity-free

  Finding n such that every transitive permutation group of degree n is multiplicity-free

  Mitsugu Hirasaka
  Department of Mathematics, Pusan National University, Pusan, Korea</a>

  2009/5/1 Friday 4PM-5PM

  This is a joint work with Cai-Heng Li. Let denote the set of positive integers n such that each transitive action of degree n is multiplicity-free, and denote the set of such that n=pq for some primes p, q with </center> and where its proof owes much to classification of finite simple groups.

  Tags:

  • MitsuguHirasaka