Archive of posts with tag '최수영'

• 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

• Suyoung Choi (최수영), The rational Betti number of small covers and its combinatorics

  The rational Betti number of small covers and its combinatorics

  Suyoung Choi (최수영)
  Department of Mathematics, Ajou University

  2013/11/13 Wednesday 4PM-5PM
  ROOM 1409

  A small cover is a topological analogue of real toric varieties, and is an important object in toric topology. It is noted that the formula of the ℤ₂-cohomology ring of small cover is well-known. However, the integral cohomology ring of small covers has not been known well.

  In this talk, we discuss about the Betti numbers and its torsion of the small covers associated to some nestohedra including graph associahedra. Interestingly, the Betti numbers can be computed by purely combinatorial method (in terms of graphs and hypergraphs). To our surprise, for specific families of graphs, these numbers are deeply related to well-known combinatorial sequences such as the Catalan numbers and Euler zigzag numbers.

  Tags:

  • 최수영