Monday at 2:25pm

901 Van Vleck

Fall 2016 Schedule

**September**-
**12**Paul Terwilliger

**19**Masato Tomiyama

**26**Jerzy Kocik (Southern Illinois U.)

**October**-
**3**Jing Hao

**10**Jay Yang

**17**Baha Balantekin (UW Physics)

**24**Richard Brualdi

**31**Bo Lin (Berkeley)

**November**-
**7**Jordan Ellenberg

**14**Yang Yang

**21**Zhaochen Wang

**28**Jae-ho Lee

**December**-
**5**No meeting

**12**No meeting

Monday at 2:25pm

901 Van Vleck

Spring 2016 Schedule

**January**-
**25**William Cocke

**February**-
**1**Shamgar Gurevich

**8**Paul Terwilliger

**15**Wen Liu (Hebei Normal U. China)

**22**Stefan Catoiu (DePaul U. Chicago)

**29**Steven Sam

**March**-
**7**Zhaochen Wang

**14**Sarah Bockting-Conrad (DePaul U. Chicago)

**21**Spring Recess

**28**Sarah Post (U. Hawaii at Manoa)

**April**-
**4**Richard Brualdi

**11**Daniel Erman

**18**Jae-ho Lee (Tohoku U. Japan)

**25**Masato Tomiyama

**May**-
**2**No meeting

Monday at 2:25pm

901 Van Vleck

Fall 2015 Schedule

**September**-
**7**Labor day recess

**14 (in B219VV)**Darren Funk-Neubauer (Colorado State U. at Pueblo)

**21 (in 120 Ingraham)**Eric Ramos

**28 (in 120 Ingraham)**Yang Yang

**October**-
**5 (in 120 Ingraham)**Steven Sam

**12 (in 120 Ingraham)**Richard Brualdi

**19 (in 120 Ingraham)**Georgia Benkart

**26 (in 901 VV)**Hiroyuki Yamane (U. Toyama, Japan)

**November**-
**2 (in 901 VV)**Wen Liu (Hebei Normal U. China)

**9 (in 901 VV)**Alberto Elduque (U. Zaragoza, Spain)

**16 (in 901 VV)**Yuta Watanabe (Tohoku U. Japan)

**23 (in 901 VV)**Zhaochen Wang

**30 (in 901 VV)**Rafael Cantuba (De La Salle U. Manila)

**December**-
**7 (in 901 VV)**Yang Yang

**14 (in 901 VV)**Paul Terwilliger

Monday at 2:25pm

901 Van Vleck

Spring 2015 Schedule

**January**-
**26**Eric Ramos

**February**-
**2**Aiping Deng (Donghua U. Shanghai)

**9**Paul Terwilliger

**16**Richard Brualdi

**23**Jae-ho Lee (Tohoku U. Japan)

**March**-
**2**Takuya Ikuta (Kobe Gakuin U. Japan)

**9**Michael Schroeder (Marshall U. WV)

**16**Alison Gordon Lynch

**23**Thao Vu (U. Tours, France)

**April**-
**6**Gabriel Pretel

**13**Zhaochen Wang

**20**Alison Gordon Lynch

**27 (1:20 901VV)**Gabriel Pretel

**May**-
**4**Mark MacLean (Seattle U.)

Monday at 2:25pm

901 Van Vleck

Fall 2014 Schedule

**September**-
**8**Wei-Hsuan Yu (Michigan State)

**15**Frank Hall (Georgia State)

**22**Apoorva Khare (Stanford)

**29 (1:20 901VV)**Adam Gal (Tel-Aviv U.)

**29 (2:25 901VV)**Elena Gal (Tel-Aviv U.)

**October**-
**6**Richard Askey

**13**Aiping Deng (Donghua U. Shanghai)

**20**Richard Brualdi

**27**Alison Gordon Lynch

**November**-
**3**Patricia Hersh (N. Carolina State)

**10**Georgia Benkart

**17**Paul Terwilliger

**24**Gabriel Pretel

**December**-
**1**Andrew Loveridge

**8**James Hanson

Monday at 2:25pm

901 Van Vleck

Spring 2014 Schedule

**January**-
**27**Jae-ho Lee

**February**-
**3**Ameera Chowdhury (Carnegie Mellon)

**10**Max Glick (U. Minnesota)

**17**Richard Brualdi

**24**Eliseu Fritscher (UFRGS, Brazil)

**March**-
**3**Gabriel Pretel

**10**Sarah Bockting-Conrad

**17**Spring Recess

**24**Paul Terwilliger

**31**Aiping Deng (Donghua U. Shanghai)

**April**-
**7**Alison Gordon Lynch

**14**Zhongshan (Jason) Li (Georgia State University)

**21**Shamgar Gurevich

**28**Sarah Bockting-Conrad

**May**-
**5**Pascal Baseilhac (U. Tours, France)

Monday at 2:25pm

901 Van Vleck

Fall 2013 Schedule

**September**-
**9**Paul Terwilliger

**16**Alison Gordon Lynch

**23**Robin Pemantle (U. Penn)

**30**Bogdan Ion (U. Pittsburgh)

**October**-
**7**Cathryn Holm

**14**Dragan Stevanovic (U. Primorska, U. Nis)

**21**Gabriel Pretel

**28**Bill Martin (WPI)

**November**-
**4**Hwa-Kyung Kim (Sangmyung U.)

**11**Richard Brualdi

**18**Matthias Lenz (Oxford U.)

**25**Eliseu Fritscher (UFRGS, Brazil)

**December**-
**2**Eliseu Fritscher

**9**Stefko Miklavic (U. Primorska)

Monday at 2:25pm

901 Van Vleck

Spring 2013 Schedule

**January**-
**28**Paul Terwilliger

**February**-
**4**Edward Hanson

**11**Alison Gordon Lynch

**18**Gabriel Pretel

**25**Xiang Han (U.W. Whitewater)

**March**-
**4**No seminar

**11**Cathryn Holm

**18**Hwa Kim

**25**Spring recess

**April**-
**1 (1:20 901 VV)**Peter Tingley (Loyola U.)

**1 (2:25 901 VV)**Emily Peters (Northwestern)

**8**Jae-ho Lee

**15**Richard Brualdi

**22 (1:20 901 VV)**Jason Gaddis (U.W. Milwaukee)

**22 (2:25 901 VV)**Lauren Williams (U.W. Milwaukee)

**May**-
**6**Sarah Bockting-Conrad

Monday at 2:25pm

901 Van Vleck

Fall 2012 Schedule

**September**-
**10**Gabriel Pretel

**17**Sarah Bockting-Conrad

**24**Jae-ho Lee

**October**-
**1**Paul Terwilliger

**8**Jang Soo Kim (U. Minnesota)

**15**Cathryn Holm

**22**Richard Brualdi

**29**Alison Gordon

**November**-
**5**Vincent Genest (U. Montreal)

**12**Jonah Blasiak (U. Michigan)

**19**Georgia Benkart

**26**Shamgar Gurevich

**December**-
**3**Zajj Daugherty (Dartmouth)

**10**Nathan Manning (U. Ottawa)

Monday at 2:25pm

901 Van Vleck

Spring 2012 Schedule

**January**-
**23**Seth Meyer

**30**Vidya Venkateswaran (CalTech)

**February**-
**6**Ed Hanson

**13**Sarah Bockting

**20**Paul Terwilliger

**27**Tullia Dymarz

**March**-
**5**Jonathan Lima

**12**Thomas Roby (Visiting MIT)

**19**Shuchi Chawla (UW CS dept)

**26**Gabriel Pretel

**April**-
**2**Spring Recess

**9**Richard Brualdi

**16**Alison Gordon

**23**Georgia Benkart

**30**Boyd Worawannotai

**May**-
**7**Jae-ho Lee

**14**Stefko Miklavic (U. Primorska, Slovenia)

Monday at 2:25pm

901 Van Vleck

Fall 2011 Schedule

**September**-
**12**Richard Brualdi

**19**Bostjan Frelih (U. Primorska, Slovenia)

**26**Jernej Tonjek (U. Ljubljana, Slovenia)

**October**-
**3**Melanie Matchett Wood

**10**Amos Ron (UW CS dept)

**17**Shamgar Gurevich

**24**Gabriel Pretel

**31**Boyd Worawannotai

**November**-
**7**Eric Bach (UW CS dept)

**14**Philip Matchett Wood

**21**Seth Meyer

**28**Jae-ho Lee

**December**-
**5**Dima Arinkin (UNC-Chapel Hill)

**12**Alison Gordon

Monday at 2:25pm

901 Van Vleck

Spring 2011 Schedule

**January**-
**24**Hajime Tanaka

**31**Ana-Maria Castravet

**February**-
**7**Dongho Moon

**14**George Brown

**21**Seth Meyer

**28**Gabriel Pretel

**March**-
**7**Rie Tanaka

**14**Spring Recess

**21**Georgia Benkart

**28**Michael Schroeder

**April**-
**4**Alison Gordon

**11**"Turbo" Meng-Che Ho

**15 (2:25 901 VV)**Kailash Misra (North Carolina State U.)

**18**Jae-ho Lee

**25**Sarah Bockting

**May**-
**2**Shamgar Gurevich

Monday at 2:25pm

901 Van Vleck

Fall 2010 Schedule

**August**-
**30**Sarah Bockting

**September**-
**6**Labor day holiday

**13**Paul Terwilliger

**20**Richard Brualdi

**27**Sho Suda (Tohoku U. Japan)

**October**-
**4**Oleg Musin (U. Texas at Brownsville)

**11**Boyd Worawannotai

**18**Michael Schroeder

**25**Hajime Tanaka

**November**-
**1**Rie Tanaka

**8**Rachel Quinlan (U. Galway, Ireland)

**15**Shifra Reif (Weizmann Institute)

**22**Hiroshi Nozaki (Tohoku U. Japan)

**29**Hau-wen Huang

**December**-
**6**Edward Hanson

**13**Ali Godjali

Monday at 2:25pm

901 Van Vleck

Spring 2010 Schedule

**January**-
**25**Paul Terwilliger

**February**-
**1**Rahbar Virk

**8**Hau-wen Huang (National Chiao Tung University, Taiwan)

**15**Stefko Miklavic (U. Primorska, Slovenia)

**22**Richard Brualdi

**March**-
**1**Seth Meyer

**8**Raimundas Vidunas (Kobe University, Japan)

**15**Edward Hanson

**22**Gabriel Pretel

**29**Spring recess

**April**-
**5**Vladimir Tonchev (Michigan Tech)

**12**Rie Tanaka (Tohoku U. Japan)

**19**Emeric Deutsch (Polytechnic Institute of New York U.)

**26**Michael Schroeder

**May**-
**3**Gernot Michael Engel

Monday at 2:25pm

901 Van Vleck

Fall 2009 Schedule

**August**-
**31**Edward Hanson

**September**-
**7**Labor day

**14**Aleksandar Jurisic (U. Ljubljana Slovenia)

**21**Xiaoguang Ma (MIT)

**28**Martha Yip

**October**-
**5**Don Kreher (Mich. Tech)

**12**David Clark (Mich. Tech)

**19**Seth Meyer

**26**Ali Godjali

**November**-
**2**Diana Cerzo

**9**Hiroshi Suzuki (ICU Japan)

**16**Richard Brualdi

**23**Michael Schroeder

**30**Bridget Tenner (DePaul U.)

**December**-
**7**Sergei Sergeev (U. Birmingham UK)

**14**Ales Drapal

Monday at 2:25pm

901 Van Vleck

Spring 2009 Schedule

**January**-
**26**Paul Terwilliger

**February**-
**2**Boyd Worawannotai

**9**Diana Cerzo

**16**Ali Godjali

**23**Adam Berliner

**March**-
**2**Mihai Ciucu (U. Indiana)

**9**Zajj Daugherty

**16**Spring break

**23**Richard Brualdi

**30**Gabriel Pretel

**April**-
**6**Louis Deaett

**13**Seth Meyer

**20 (1:20 901 VV)**Hajime Tanake (Tohoku U. Sendai)

**20 (2:25 901 VV)**Rie Tanake (Tohoku U. Sendai)

**27**Mike Schroeder

**May**-
**4**Anna Saputera

**11 (2:00 pm, 901 VV)**Boyd Worawannotai

Monday at 2:25pm

901 Van Vleck

Fall 2008 Schedule

**September**-
**8**Paul Terwilliger

**15**Michael Gekhtman (Notre Dame)

**22**George Brown

**29**Aleksandar Jurisic (U. Ljubljana Slovenia)

**October**-
**6**Michael Lang (Bradley U.)

**13**Plamen Iliev (Georgia Tech.)

**20**Bill Martin (WPI)

**27**Stefko Miklavic (U. Primorska, Slovenia)

**November**-
**3**Richard Brualdi

**10**Louis Deaett

**17**Andrei Calderaru

**24**Vadim Olshevsky (U. Connecticut)

**December**-
**1**Adam Berliner

**8**Sergei Sergeev (U. Birmingham UK)

Monday at 2:25pm

901 Van Vleck

Spring 2007 Schedule

**January**-
**22**Richard Brualdi

**24 (1:30, 901VV)**Bridget Tenner

**29**Dong-il Lee (Seoul Natl. U.)

**February**-
**5**Amos Ron (U.W. Comp. Sci. Dept.)

**12**Stefko Miklavic (U. Ljubljana Slovenia)

**19**Christoph Schwer

**26**Paul Terwilliger

**March**-
**5**Jon Godshall

**12 (3:30 B131VV)**Stefko Miklavic

**19**Bill Martin (WPI)

**26**Kathleen Kiernan

**April**-
**2**Spring break

**9**Louis Deaett

**16**Lauren Williams (Harvard)

**23**Mike Schroeder

**30**Melvin Vidar

**May**-
**7**Joohyung Kim

**9 (2:25, B333 VV)**Helene Barcelo (Arizona State U.)

Monday at 2:25pm

901 Van Vleck

Fall 2006 Schedule

**September**-
**11**Richard Brualdi

**18**Bill Martin (WPI)

**18 (3:30pm, B341 VV)**Alberto Grunbaum (Berkeley)

**25**Bill Martin

**October**-
**2**Arjana Zitnik (U. Ljubljana Slovenia)

**2 (3:30pm, B341 VV)**Aleksandar Jurisic (U. Ljubljana Slovenia)

**9**Paul Hermann Zieschang (U. Brownsville TX)

**16**James Parkinson

**23**Terry Gannon (U. Alberta CA)

**30**Paul Terwilliger

**November**-
**6**Claudia Malvenuto, University of Rome, La Sapienza

**13**George Brown

**20**Joohyung Kim

**27**Ales Drapal

**December**-
**4 (B305 VV)**Ashwin Ganesan (U.W. ECE dept.)

**11**Adam Berliner

Monday at 2:25pm

901 Van Vleck

Spring 2006 Schedule

**January**-
**23**Paul Terwilliger

**30**Richard Brualdi

**February**-
**6**Susan Hollingsworth

**13**Jin-Yi Cai (UW Comp. Sci. Dept.)

**20**Christine Heitsch

**27**Arun Ram

**March**-
**6**Lev Borisov

**13**Spring break

**27**Martin Schlichenmaier (U. Luxembourg)

**April**-
**3**Benjamin Otto

**10**Jon Godshall

**17**Han Hyuk Cho

**24**Louis Deaett

**May**-
**1**Patricia Hersh (U. Indiana)

**5**Don Cartwright (U. Sydney, Rutgers) (2:25pm, B333 Van Vleck)

Monday at 2:25pm

901 Van Vleck

Fall 2005 Schedule

**September**-
**12**Paul Terwilliger

*Distance-regular graphs and the quantum affine sl2 algebra***19**David Callan (UW Dept. of Statistics)

*Generalizing the Catalan numbers***26**Nigel Boston

*Risk and return considerations in The Weakest Link* **October**-
**3**Kathrin Bringmann

*On mock theta functions and a conjecture of Dragonette and Andrews***10**Richard Brualdi

*Latin squares, matroids, partitions, (0,1)-matrices, Young tableaux, graphs, matchings,...***17**Mikhail Klin (Ben Gurion U. Israel)

*Links between Latin squares, nets, graphs and groups: work inspired by a paper of A. Barlotti and K. Strambach***24**Etsuko Bannai (Kyushu U. Japan)

*On Euclidean designs***31**Sharon Garthwaite

*Convolution congruences for the partition congruences* **November**-
**7**John Goldwasser (West Virginia U.)

*Maximum size antichains and the COLEX order***14**Brian Hartwig

*The tetrahedron algebra***21**Jackie Anderson

*The largest (s,t)-core partition***28**Dina Christodoulopoul

*An introduction to affine Weyl groups* **December**-
**5**H.K. Kim (Seoul Natl. U. Korea)

*Competition indices of primitive digraphs***12**Louis Deaett

*More on the Bruhat order for (0,1)-matrices*

Monday at 2:25pm

901 Van Vleck

Spring 2005 Schedule

**January**-
**24**Paul Terwilliger

*Bidiagonal triples and the quantum algebra Uq(sl2)***31**Richard Brualdi

*Some remarks on the Bruhat order for (0,1) matrices* **February**-
**7**Brian Hartwig

*Onsager pairs and the Tetrahedron algebra***14**Richard Askey

*q-factorial, q-gamma and q-beta functions***21**Nigel Boston

*Capacity-achieving graph-based codes***28**Georgia Benkart

*A combinatorial tripleheader: lambda-determinants, Schur functions, and perfect matchings* **March**-
**7**Christine Heitsch

*Random de Bruijn sequences and the design of DNA codewords***14**Adam Berliner

*Sidon sequences and magic graphs***21**Spring break

**28**Han Cho

*Competition graphs and numbers* **April**-
**4**Jim Propp

*The combinatorics of Markoff numbers***11**Susan Hollingsworth

*Cycle decompositions and path packings of K_nn***18**Bret Benesh

*A survey of probabilistic group theory***25**Stephan Griffeth

*TBA* **May**-
**2**Arlene Pascasio (U. De La Salle Philippines)

*The pseudo primitive idempotents of a distance-regular graph*

Monday at 2:25pm

901 Van Vleck

Fall 2004 Schedule

**September**-
**13**Kyle Petersen (Brandeis)

*Descent algebras and P-partitions***20**John Bowman

*Symmetric functions and the cohomology of Springer fibers***27**Paul Terwilliger

*The compact representation of a Leonard pair* **October**-
**4**Cathy Yan (Texas AM)

*Noncrossing and nonnesting matchings***11**Richard Brualdi

*Perfect Matching Preservers***18**Jaclyn Anderson

*A proof of a conjecture of Stanton***25**Karl Mahlburg

*A new approach to cranks and ranks* **November**-
**1**Jeremy Lovejoy (CNRS)

*Extending partition theorems of Schur and Gollnitz to overpartitions***8**Pascal Vontobel

*The edge zeta function of graphs and enumerating backtrackless, tailless cycles***15**Stefko Miklavic (Nova Gorica)

*Some equitable partitions of Q-polynomial distance-regular graphs***22**Jose Dias da Silva (Lisbon)

*Orthogonal dimension of orbital sets***29**Bob Wilson

*Rook numbers and the normal ordering problem* **December**-
**6**Dina Christodoulopoul

*Cluster algebras***13**Arun Ram

*Paths, charge and Kostka-Foulkes polynomials*

Monday at 2:25pm

901 Van Vleck

Spring 2004 Schedule

**January**-
**26**Dick Askey

*A determinant of Sylvester and some extensions* **February**-
**2**Stephen Griffeth

*Schubert calculus, Hecke algebras, and the Yang-Baxter equation***9**Arun Ram

*A new look at the path model***16**Paul Terwilliger

*An extension of the quantum affine sl2 algebra***23**Open

**March**-
**1**Open

**8**Adam Berliner, Rike Bostelmann, Louis Deaett

*Sum choice numbers of graphs***15**Spring break

**22**John Caughman (Portland State U.)

*Distance-regular graphs and spin models***29**Holly Swisher

*The Andrews-Stanley partition function and p(n)* **April**-
**5**Jose Dias da Silva

*TBA***12**Marcelo Aguiar (Texas AM)

*Loday's types of algebras and Rota's types of operators***19**Brian Hartwig

*Three mutually adjacent Leonard pairs***26**Christine Heitsch

*Further combinatorial results motivated by computational biology* **May**-
**3**Darren Neubauer

*Raising and lowering maps and modules for the quantum affine sl2 algebra***10**John Hall

*Semigroups and combinatorics: radicals, Schur functions, and sandwich matrices*

Monday at 2:25pm

901 Van Vleck

Fall 2003 Schedule

**September**-
**8**Jim Propp

*Markoff numbers***15**Yuval Roichman (Bar Ilan)

*Descent representations and the flag major index***22**Sergey Fomin (U. Michigan)

*Double Bruhat cells: total positivity and cluster algebras***29**Slavik Jablan (Belgrade)

*The Knot-theory program LinKnot* **October**-
**6**Jaclyn Anderson

*On the existence of rook equivalent t-cores***13**Mona Musa (U. Illinois)

*The double circulant conjecture for quadratic residue codes***20**No meeting

**27**Lev Borisov

*Complexity of binomial ideals* **November**-
**3**Richard Brualdi

*Bigraphs, digraphs, SNS-matrices, tilings, and Aztec diamonds***10**Peter Orlik

*Ranking patterns***17**Ada Chan (Caltech)

*Jones pairs and association schemes***24**Patricia Hersh (U. Michigan)

*A GL_n(q) analog of the partition lattice* **December**-
**1**Matt Ondrus

*Whittaker modules, central characters and tensor products of modules for U_q(sl_2)***8**Susan Hollingsworth

*k-ordered bipartite graphs*

Monday at 2:25pm

901 Van Vleck

Spring 2003 Schedule

**January**-
**27**Christine Heitsch

*Combinatorial results motivated by computational biology* **February**-
**3**Arun Ram

*Diagram algebras***10**Jeremy Lovejoy

*Overpartitions***17**Lev Borisov

*Jacobi triple product formula and boson-fermion correspondence***24**Paul Terwilliger

*Some tridiagonal pairs associated with quantum affine sl2.* **March**-
**3**Sylvie Corteel

*Lecture hall theorems***10**Uri Keich (UCSD)

*On designing seeds for similarity search in genomic DNA***24**Eric Mortenson

*Supercongruences for truncated hypergeometric series***31**Richard Brualdi

*List colorings of graphs and SDRs* **April**-
**7**Jackie Anderson

*Does there exist a [72,36,16] type II code?***14**Brian Hartwig

*Leonard pairs in the representation theory of Uq(sl2)***21**Darren Neubauer

*Introduction to the q-shuffle algebra***28**Steve Kirkland (U. Regina Canada)

*Digraph-based conditioning for Markov chains* **May**-
**5**Richard Askey

*A new look at Fibonacci numbers*

Monday at 2:25pm

901 Van Vleck

Fall 2002 Schedule

**September**-
**9**Nigel Boston

*The probability of generating a finite group***16**Aleksandar Jurisic (U. Ljubljana Slovenia)

*Locally GQ tight distance-regular graphs***23**Arlene Pascasio (U. De La Salle Philippines)

*On the multiplicities of the primitive idempotents of a distance-regular graph***30**Paul Terwilliger

*Leonard pairs and orthogonal polynomials* **October**-
**7**Hjalmar Rosengren (Chalmers U. Tech. Sweden)

*Leonard pairs and quantum group theory***14**Bogdan Petrenko (U. Illinois)

*On the sum and the product of two primitive elements of maximal subfields of a finite field***21**Stephen Griffeth

*Alternating sign matrices and the K-theory of flag varieties***28**Mourad Ismail (U. South Florida)

*Rogers-Ramanujan identities and difference equations* **November**-
**4**Richard Brualdi

*Matrices in combinatorics with applications***11**Jacob Christiansen (U. Copenhagen Denmark)

*The log-normal moment problem***18**Brian Hartwig

*Clusters of Leonard pairs***25**Georgia Benkart

*Aztec diamonds and the (in)famous rho* **December**-
**2**Yang Chen (Imperial College UK)

*Generalized Chebyshev Polynomials***9**Timo Seppalainen

*Increasing path models and interacting particle systems*

Monday at 2:25pm

901 Van Vleck

Spring 2002 Schedule

**January**-
**28**Yiftach Barnea

*Hausdorff dimensions and the Nottingham group* **February**-
**4**Paul Terwilliger

*Two linear transformations each tridiagonal with respect to an eigenbasis for the other: a canonical form***11**Morgen Bills (U. Michigan)

*Brauer tableaux, Brauer polytabloids, and some sign-reversing involutions***18**Arun Ram

*Generalizing the dominance order on partitions***25**Antal Balog

*What is A if A+A is small?* **March**-
**4**Karl Mahlburg

*Partition identities and a theorem of Zagier***11**Hiroshi Suzuki (Ohio State U.)

*Type II matrices and their Bose-Mesner algebras***18**Richard Brualdi

*Maximal nests of subspaces with an application to graph coloring***25**Spring break

**April**-
**1**Susan Hollingsworth

*On a conjecture about trees in graphs with large girth***8**Patricia Hersh (U. Michigan)

*Optimizing discrete Morse functions***12**Jonathan David Farley (U. Vanderbilt)

*Differential posets and distributive lattices: a 1975 conjecture of Richard Stanley***15**Hans Schneider

*The recent discovery of Wielandt's proof of the exponent inequality for primitive nonnegative matrices***22**Geir Helleloid

*The m-step competition graph of a digraph***29**Kendra Nelsen

*Charge and the Kostka-Foulkes polynomial* **May**-
**6**Georgia Benkart

*Some Temperley-Lieb combinatorics*

Monday at 2:25pm

901 Van Vleck

Fall 2001 Schedule

**September**-
**10**Arun Ram

*Introduction to affine Hecke algebras***17**Jack Koolen (Eindhoven)

*The energy of a graph***24**Richard Brualdi

*Linear preservers and diagonal hypergraphs* **October**-
**1**Bill Martin (Worcester Polytechnic)

*The biweight enumerator and the subconstituent algebra of the hypercube***8**Gerald Cliff (U. Alberta)

*Determining irreducible modular GL(n,K)-modules***15**Ken Ono

*Questions and theorems about t-core partitions***22**Hans Schneider

*Diagonal scaling: sunny side up and once over lightly***29**Brian Curtin (U. South Florida)

*Graph Homomorphisms and Graph Automorphisms* **November**-
**5**Eric Bach (CS dept UW)

*Combinatorial analysis of quantum random walks***12**Hiroshi Suzuki (Ohio State U.)

*On weakly distance-regular digraphs***19**Matt Bloss

*Irreducible representations of a centralizer algebra of a complex reflection group***26**Alexander Kleshchev

*Representations of alternating groups and beyond* **December**-
**3**Jack Koolen

*Are there finitely many distance-regular graphs with fixed valency?***10**Brian Hartwig

*Truncated hypergeometric series*

Monday at 2:25pm

901 Van Vleck

Spring 2001 Schedule

**January**-
**22**Paul Terwilliger

*How to recognize a Leonard pair***29**Mike Lang

*Distance-regular graphs and the Q-polynomial property* **February**-
**5**Jim Propp

*Domino Tilings: enumeration, random generation, and asymptotics***12**Warren Johnson

*Combinatorics of higher derivatives of inverse functions***19**Alberto Elduque

*Maximal subalgebras of associative superalgebras***26**Bryan Shader (U. Wyoming)

*Dynamics, digraphs and diophantine equations* **March**-
**5**Matt Bloss

*Centralizer algebras of complex reflection groups***12**Spring break

**19**Susan Hollingsworth

*TBA***26**Alexei Borodin (U. Penn)

*Harmonic analysis on the infinite symmetric group* **April**-
**2**Arnold Neumaier (U. Vienna, Austria)

*Large-scale mixed model estimation for animal breeding and census data***9**Richard Askey

*Some elementary combinatorics related to teaching***16**Alexei Zhedanov (Donetsk Inst. of Physics, Ukraine)

*Spectral transformations, numerical algorithms, self-similarity and special functions***23**Paul-Hermann Zieschang (U. Kiel)

*Local and global scheme theory***30**Gwynneth Coogan

*A combinatorial identity and an application to Hurwitz Zeta functions* **May**-
**7**Free

Monday at 2:25pm

901 Van Vleck

Fall 2000 Schedule

**September**-
**11**Alexsandar Jurisic (Nova Gorica Polytechnic, Slovenia)

*Distance-regular graphs with the 1-homogenous property***18**Paul Terwilliger

*Leonard pairs from 24 points of view***25**Susan Hollingsworth

*Partitions of a graph into paths with prescribed endvertices and lengths* **October**-
**2**Arun Ram

*Standard Young tableaux for classical type root systems***9**Jeremy Lovejoy

*Arithmetic properties of combinatorial functions***16**Chris Godsil (U. Waterloo, CA)

*Spin Models***23**Bill Martin (Worcester Polytechnic)

*Width and Dual Width of Subsets in P- and Q- polynomial schemes***30**Katsuhisa Mimachi (Kyushu U. Japan)

*Monodromy representations associated with a Selberg type integral; realization of the Iwahori-Hecke algebra* **November**-
**6**Robert Donnelly (Murray State U.)

*Solitary bases for representations of semisimple Lie algebras***13**Norman Wildberger

*A-D-E graphs and the mutation and numbers games***20**Georgia Benkart

*Tensor powers of sl(r)***27**Andrei Kelarev

*On transitive Cayley graphs of groups and semigroups* **December**-
**4**Mark Maclean

*Latin squares without proper subrectangles***11**John Caughman (Portland State U.)

*Bipartite distance-regular graphs with the Q-polynomial property*