#### Contributed Posters:

 Hopf Algebras of Diagrams G. H. E. Duchamp, J-G. Luque, J-C. Novelli, C. Tollu, and F. Toumazet
 Inequalities for Symmetric Means Allison Cuttler, Curtis Greene, and Mark Skandera
 Descent Patterns in Permutations Amanda Riehl
 Schur Function Identities and Hook Length Posets Masao Ishikawa and Hiroyuki Tagawa
 Alternating Subgroups of Coxeter Groups Francesco Brenti, Victor Reiner, and Yuval Roichman
 Grid Polygons From Permutations and Their Enumeration by the Kernel Method Toufik Mansour and Simone Severini
 Jacobi-Trudi Formula for Jack Functions of Rectangular Shapes and Hyperdeterminants Sho Matsumoto
 A Theory of General Combinatorial Differential Operators Gilbert Labelle and Cédric Lamathe
 Analysis of Some Exactly Solvable Diminishing Urn Models Hsien-Kuei Hwang, Markus Kuba, and Alois Panholzer
 Complexes of Directed Trees and Independence Complexes Alexander Engström
 Pattern-Avoiding Fillings of Rectangular Shapes Vít Jelínek
 Abstract Young Pairs for Coxeter Groups of Type D Eli Bagno and Yona Cherniavsky
 Demazure Atoms Sarah Mason
 Extended Quadratic Algebra and a Model of the Equivariant Cohomology Ring of Flag Varieties Anatol N. Kirillov and Toshiaki Maeno
 Characterizations of Flip-Accessibility for Domino Tilings of the Whole Plane Olivier Bodini, Thomas Fernique and Éric Rémila
 Macdonald Symmetric Functions for Partitions With Complex Parts Michael J. Schlosser
 Multiparking Functions, Graph Searching, and the Tutte Polynomial Dimitrije Kostic and Catherine H. Yan
 Unification of the Quintuple and Septuple Product Identities Wenchang Chu and Qinglun Yan
 Key Polynomials, Invariant Factors and an Action of the Symmetric Group on Young Tableaux Olga Azenhas and Ricardo Mamede
 Combinatorial Realisation of Hall-Littlewood Polynomials at t = -1 R. C. King and A. M. Hamel
 Involutions Avoiding the Class of Permutations in $\mathfrak{S}_k$ With Prefix 12 W. M. B. Dukes and Toufik Mansour
 On the Young-Fibonacci Insertion Algorithm Janvier Nzeutchap
 Major Indices, Mahonian Identities and Ordered Generating Systems Robert Shwartz
 On Uniquely k-Determined Permutations Sergey Avgustinovich and Sergey Kitaev
 Operations on Posets and Rational Identities of Type A Adrien Boussicault
 On Euler's Difference Table Fanja Rakotondrajao
 Compound Basis Arising From the Basic $A_{1}^{(1)}$-Module Kazuya Aokage and Hiroshi Mizukawa
 An Extension of the Foata Map to Standard Young Tableaux J. Haglund, and L. Stevens
 Elliptic Curve Groups and Chip-Firing Games Gregg Musiker
 The Hook Formula Jason Bandlow
 Variance for the Number of Maxima in Hypercubes and Generalized Euler¡¯s $\gamma$ Constants Christian Costermans and Hoang Ngoc Minh
 The Automorphism Group of a Finite p-Group is Almost Always a p-Group Geir T. Helleloid and Ursula Martin
 Generating Functions From the Point of View of Rota¨CBaxter Algebras Li Guo
 Signed Enumeration of Ribbon Tableaux With Local Rules and Generalizations of the Schensted Correspondence Dominique Gouyou-Beauchamps and Philippe Nadeau
 Kazhdan-Lusztig Immanants III: Transition Matrices Between Canonical Bases of Immanants Brendon Rhoades and Mark Skandera
 The Combinatorics of the Garsia-Haiman Modules for Hook Shapes Ron M. Adin, Jeffrey B. Remmel, and Yuval Roichman
 Parameterized Telescoping Proves Algebraic Independence of Sums Carsten Schneider
 Dumont Permutations of the Third Kind Alexander Burstein and Walter Stromquist
 A Classification of Outerplanar K-Gonal 2-Trees Martin A. Ducharme, Gilbert Labelle, Cédric Lamathe, and Pierre Leroux
 Complete Decomposition of Dickson-Type Recursive Polynomials and a Related Diophantine Equation Thomas Stoll