ICTP-IPM Workshop and Conference in Combinatorics and Graph Theory

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Contributed Talks Schedule.pdf List of Abstracts List of Participants Photo announcement

ICTP-IPM Workshop and Conference in Combinatorics and Graph Theory | (smr 2364)

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Monday, 3 September 2012

08:30 - 10:15 REGISTRATION OF THE PARTICIPANTS AND ADMINISTRATIVE FORMALITIES

Location: Leonardo da Vinci Building, Lobby
- 08:30 REGISTRATION OF THE PARTICIPANTS AND ADMINISTRATIVE FORMALITIES 1h45'
10:15 - 10:30 Workshop Opening
- 10:15 Workshop Opening 15'
  
  Speaker: Stefano Luzzatto (ICTP, Italy)

10:30 - 12:00 Random Graphs - I

10:30 Random Graphs - I 1h30'

Speaker:	Joel Spencer (New York University, New York, NY, USA)
Material:	lecture notes

12:00 - 14:00 Lunch break
- 12:00 Lunch break 2h0'
14:00 - 15:30 Eigenvalue techniques in graph theory, part 1
- 14:00 Eigenvalue techniques in graph theory, part 1 1h30'
  
  Speaker: Willem Haemers (Tilburg University, Tilburg, The Netherlands)
15:30 - 17:00 Quantum Walks and Algebraic Graph Theory, part 1
- 15:30 Quantum Walks and Algebraic Graph Theory, part 1 1h30'
  
  Speaker: Chris Godsil (University of Waterloo, Ontario, Canada)
18:30 - 20:30 GET TOGETHER PARTY (Leonardo da Vinci Building, terrace level)
- 18:30 GET TOGETHER PARTY (Leonardo da Vinci Building, terrace level) 2h0'

Tuesday, 4 September 2012

09:00 - 10:30 The Phase Transition - II

09:00 The Phase Transition - II 1h30'

Speaker:	Joel Spencer (New York University, New York, NY, USA)
Material:	lecture notes

10:30 - 12:00 Eigenvalue techniques in graph theory, part 2
- 10:30 Eigenvalue techniques in graph theory, part 2 1h30'
  
  Speaker: Willem Haemers (Tilburg University, Tilburg, The Netherlands)
12:00 - 14:00 Lunch break
- 12:00 Lunch break 2h0'

14:00 - 15:30 Smith Form and p-ranks of Incidence Matrices, part 1

14:00 Smith Form and p-ranks of Incidence Matrices, part 1 1h30'

Speaker:	Richard M. Wilson (Caltech, Pasadena CA, USA)
Material:	lecture notes

15:30 - 17:00 Applications of the Hall-Rado Theorem - I

15:30 Applications of the Hall-Rado Theorem - I 1h30'

Speaker:	Richard A. Brualdi (University of Wisconsin, Madison WI, USA)
Material:	lecture notes

Wednesday, 5 September 2012

09:00 - 10:30 Applications of matrix permanents in counting problems - II

09:00 Applications of matrix permanents in counting problems - II 1h30'

Speaker:	Ian Wanless (Monash University, Victoria, Australia)
Material:	lecture notes

10:30 - 12:00 Quantum Walks and Algebraic Graph Theory, part 2
- 10:30 Quantum Walks and Algebraic Graph Theory, part 2 1h30'
  
  Speaker: Chris Godsil (University of Waterloo, Ontario, Canada)
12:00 - 14:00 Lunch break
- 12:00 Lunch break 2h0'
14:00 - 15:30 Smith Form and p-ranks of Incidence Matrices, part 2
- 14:00 Smith Form and p-ranks of Incidence Matrices, part 2 1h30'
  
  Speaker: Richard M. Wilson (Caltech, Pasadena CA, USA)
15:30 - 17:00 Beautiful proofs and conjectures on graphs and hypergraphs, part 1
- 15:30 Beautiful proofs and conjectures on graphs and hypergraphs, part 1 1h30'
  
  Speaker: Adrian Bondy (Université Pierre et Marie Curie, Paris, France)

Thursday, 6 September 2012

08:30 - 09:45 Inside the Phase Transition - III

08:30 Inside the Phase Transition - III 1h15'

Speaker:	Joel Spencer (New York University, New York, NY, USA)
Material:	lecture notes

09:45 - 10:45 Eigenvalue techniques in graph theory, part 3
- 09:45 Eigenvalue techniques in graph theory, part 3 1h0'
  
  Speaker: Willem Haemers (Tilburg University, Tilburg, The Netherlands)
10:45 - 11:00 Group Photo, Terrace Level
- 10:45 Group Photo, Terrace Level 15'

11:00 - 12:00 Presentation of the Ramanujan Prize to Fernando Coda Marques

11:00 Presentation of the Ramanujan Prize to Fernando Coda Marques 1h0'

Speaker:	Fernando Quevedo (Director, ICTP, Italy)
Material:	RamanujanPrize2012.pdf

12:00 - 14:00 Lunch break
- 12:00 Lunch break 2h0'
14:00 - 15:30 Beautiful proofs and conjectures on graphs and hypergraphs, part 2
- 14:00 Beautiful proofs and conjectures on graphs and hypergraphs, part 2 1h30'
  
  Speaker: Adrian Bondy (Université Pierre et Marie Curie, Paris, France)
15:30 - 17:00 Quantum Walks and Algebraic Graph Theory, part 3
- 15:30 Quantum Walks and Algebraic Graph Theory, part 3 1h30'
  
  Speaker: Chris Godsil (University of Waterloo, Ontario, Canada)

Friday, 7 September 2012
- 09:00 - 10:30 Beautiful proofs and conjectures on graphs and hypergraphs, part 3
  - 09:00 Beautiful proofs and conjectures on graphs and hypergraphs, part 3 1h30'
    
    Speaker: Adrian Bondy (Université Pierre et Marie Curie, Paris, France)
- 10:30 - 12:00 Smith Form and p-ranks of Incidence Matrices, part 3
  - 10:30 Smith Form and p-ranks of Incidence Matrices, part 3 1h30'
    
    Speaker: Richard M. Wilson (Caltech, Pasadena CA, USA)
- 12:00 - 14:00 Lunch break
  - 12:00 Lunch break 2h0'
- 14:00 - 15:30 Alternating Sign Matrices (ACMs) - III
  - 14:00 Alternating Sign Matrices (ACMs) - III 1h30'
    
    Speaker: Richard A. Brualdi (University of Wisconsin, Madison WI, USA)
- 15:30 - 15:30 Workshop Closing
  - 15:30 Workshop Closing

Monday, 10 September 2012

08:00 - 08:45 CONFERENCE ON COMBINATORICS AND GRAPH THEORY - REGISTRATION OF THE PARTICIPANTS & ADMINISTRATIVE FORMALITIES -

Location: Leonardo da Vinci Building, Lobby
- 08:00 CONFERENCE ON COMBINATORICS AND GRAPH THEORY - REGISTRATION OF THE PARTICIPANTS & ADMINISTRATIVE FORMALITIES - 45'
08:45 - 09:00 Welcome
- 08:45 Welcome 15'

09:00 - 10:00 The "P vs. NP" problem: efficient computation, Internet security, and the limits to human knowledge

09:00 The "P vs. NP" problem: efficient computation, Internet security, and the limits to human knowledge 1h0'

Speaker:	Avi Wigderson (Introduced by G.B. Koshrovshahi) (Institute of advanced Study, Princeton, USA)
Material:	lecture notes

10:00 - 11:00 Positional Games

10:00 Positional Games 1h0'

Speaker:	Michael Krivelevich (Introduced by G.B. Koshrovshahi) (Tel Aviv University, Israel)
Material:	lecture notes

11:00 - 11:30 Break
- 11:00 Break 30'

11:30 - 12:30 Mutually unbiased weighing matrices

11:30 Mutually unbiased weighing matrices 1h0'

Speaker:	Hadi Kharaghani (Introduced by S. Akbari) (University of Lethbridge, Canada)
Material:	lecture notes

12:30 - 14:00 Lunch break
- 12:30 Lunch break 1h30'

14:00 - 15:00 On the adjacency matrix of a block graph

14:00 On the adjacency matrix of a block graph 1h0'

Speaker:	Ravi Bapat (Introduced by R.A. Brualdi) (Indian Statistical Institute, India)
Material:	slides

15:00 - 16:00 Shadows and cryptology

15:00 Shadows and cryptology 1h0'

Speaker:	Gyula Katona (Introduced by R.A. Brualdi) (Rényi Institute, Hungarian Academy of Sciences, Hungary)
Material:	lecture notes

16:00 - 16:30 Break
- 16:00 Break 30'
16:30 - 17:30 EULER Lecture Hall, Session Chair: Behruz Tayfeh Rezaie
- 16:30 EULER Lecture Hall, Session Chair: Behruz Tayfeh Rezaie 1h0'
16:30 - 17:30 STASI Room, Session Chair: Ebrahim Ghorbani
- 16:30 STASI Room, Session Chair: Ebrahim Ghorbani 1h0'
18:30 - 20:30 Get Together Party

Location: Leonardo da Vinci Building Terrace
- 18:30 Get Together Party 2h0'

Tuesday, 11 September 2012

09:00 - 10:00 Pretty Good State Transfer

09:00 Pretty Good State Transfer 1h0'

Speaker:	Chris Godsil (Introduced by H. Kharaghani) (University of Waterloo, Canada)
Material:	lecture notes

10:00 - 11:00 Parabolic Kazhdan-Lusztig and R-polynomials for quasiminuscule quotients
- 10:00 Parabolic Kazhdan-Lusztig and R-polynomials for quasiminuscule quotients 1h0'
  
  Speaker: Francesco Brenti (Introduced by H. Kharaghani) (University of Rome "Tor Vergata", Italy)
11:00 - 11:30 Break
- 11:00 Break 30'

11:30 - 12:30 Packing and covering in uniform hypergraphs

11:30 Packing and covering in uniform hypergraphs 1h0'

Speaker:	Penny Haxell (Introduced by G. Katona) (University of Waterloo, Canada)
Material:	slides

12:30 - 14:00 Lunch Break
- 12:30 Lunch Break 1h30'

14:00 - 15:00 Intersection Theorems for Finite Sets

14:00 Intersection Theorems for Finite Sets 1h0'

Speaker:	Dhruv Mubayi (Introduced by R. Bapat) (University of Illinois, Chicago, USA)
Material:	slides

15:00 - 16:00 On the Combinatorics of the Linear Lattices
- 15:00 On the Combinatorics of the Linear Lattices 1h0'
  
  Speaker: Shahriar Shahriari (Introduced by R. Bapat) (Pomona College, USA)
16:00 - 16:30 Break
- 16:00 Break 30'
16:30 - 17:30 EULER Lecture Hall, Session Chair: S. Pirzada
- 16:30 EULER Lecture Hall, Session Chair: S. Pirzada 1h0'
16:30 - 17:30 STASI Room, Session Chair: Cristina Dalfo
- 16:30 STASI Room, Session Chair: Cristina Dalfo 1h0'
19:30 - 21:00 To: All ICTP Staff, Visitors: Special Social Evening Dinner at 19.30 followed by an entertaining Magic Show in the Cafeteria of the Leonardo Building.
- 19:30 To: All ICTP Staff, Visitors: Special Social Evening Dinner at 19.30 followed by an entertaining Magic Show in the Cafeteria of the Leonardo Building. 1h30'

Wednesday, 12 September 2012

09:00 - 11:00 EULER Lecture Hall, Session Chair: G.R.Omidi
- 09:00 EULER Lecture Hall, Session Chair: G.R.Omidi 2h0'
09:00 - 11:00 STASI Room, Session Chair: Kenta Ozeki
- 09:00 STASI Room, Session Chair: Kenta Ozeki 2h0'
11:00 - 11:30 Break
- 11:00 Break 30'
11:30 - 12:30 Enumerative combinatorics with fillings of polyominoes
- 11:30 Enumerative combinatorics with fillings of polyominoes 1h0'
  
  Speaker: Catherine Yan (Introduced by F. Brenti) (Texas A&M, USA)
12:30 - 14:00 Lunch break
- 12:30 Lunch break 1h30'
14:00 - 15:00 Counting Hamiltonian Cycles in Bipartite Graphs
- 14:00 Counting Hamiltonian Cycles in Bipartite Graphs 1h0'
  
  Speaker: Patric Ostergard (Introduced by S. Shahriari) (Aalto University School of Electrical Engineering, Finland)
15:00 - 16:00 Digraph Switching Reconstruction
- 15:00 Digraph Switching Reconstruction 1h0'
  
  Speaker: Brendan McKay (Introduced by S. Shahriari) (Australian National University, Australia)
16:00 - 16:30 Break
- 16:00 Break 30'

16:30 - 17:30 Toughness and Hamiltonicity of graphs on surfaces

16:30 Toughness and Hamiltonicity of graphs on surfaces 1h0'

Speaker:	Kenta Ozeki (Introduced by P. Haxell) (National Institute of Informatics, Japan)
Material:	slides

Thursday, 13 September 2012

09:00 - 10:00 On Rank of Graphs

09:00 On Rank of Graphs 1h0'

Speaker:	Behruz Tayfeh-Rezai (Introduced by B. McKay) (IPM, Iran)
Material:	slides

10:00 - 11:00 Polynomials and Codes

10:00 Polynomials and Codes 1h0'

Speaker:	Aart Blokhuis (Introduced by B. McKay) (Technical University Eindhoven, The Netherlands)
Material:	slides

11:00 - 11:30 Break
- 11:00 Break 30'

11:30 - 12:30 Latin transversals and the covering radius of sets of permutations

11:30 Latin transversals and the covering radius of sets of permutations 1h0'

Speaker:	Ian Wanless (Introduced by P. Ostergard) (Monash University, Australia)
Material:	slides

12:30 - 14:00 Lunch break
- 12:30 Lunch break 1h30'
14:00 - 15:00 Cospectral Graphs and Regular Orthogonal Matrices of Level 2
- 14:00 Cospectral Graphs and Regular Orthogonal Matrices of Level 2 1h0'
  
  Speaker: Willem Haemers (Introduced by C. Yan) (Tilburg University, The Netherlands)
15:00 - 16:00 EULER Lecture Hall, Session Chair: Hidehiro Shinohara
- 15:00 EULER Lecture Hall, Session Chair: Hidehiro Shinohara 1h0'
15:00 - 16:00 STASI Room, Session Chair: Krystal Guo
- 15:00 STASI Room, Session Chair: Krystal Guo 1h0'
16:00 - 16:30 Break
- 16:00 Break 30'

16:30 - 18:00 ICTP Colloquium by Avi Wigderson

16:30 ICTP Colloquium by Avi Wigderson 1h30'

Material:

abstract

slides

Friday, 14 September 2012
- 09:00 - 11:00 EULER Lecture Hall, Session Chair: Alireza Abdollahi
  - 09:00 EULER Lecture Hall, Session Chair: Alireza Abdollahi 2h0'
- 09:00 - 11:00 STASI Room, Session Chair: Faqir Bhatti
  - 09:00 STASI Room, Session Chair: Faqir Bhatti 2h0'
- 11:00 - 11:30 Break
  - 11:00 Break 30'
- 11:30 - 12:30 c-Sum Flows in Graphs and Hypergraphs with Some Generalizations
  - 11:30 c-Sum Flows in Graphs and Hypergraphs with Some Generalizations 1h0'
    
    Speaker: Saieed Akbari (Introduced by B. Tayfeh-Rezaie) (Sharif University of Technology & IPM, Iran)
- 12:30 - 14:00 Lunch break
  - 12:30 Lunch break 1h30'
- 14:00 - 15:00 Generalized Reed-Muller codes and the Smith form of projective incidence matrices
  - 14:00 Generalized Reed-Muller codes and the Smith form of projective incidence matrices 1h0'
    
    Speaker: Richard M. Wilson (Introduced by W. Haemers) (California Institute of Technology, USA)
- 15:00 - 15:30 Closing
  - 15:00 Closing 30'