Representation Theory

H. H. Andersen -- Sum formulas and Ext-groups; S. Doty -- Schur-Weyl duality in positive characteristic; A. Francis and W. Wang -- The centers of Iwahori-Hecke algebras are filtered; University of Georgia Vigre Algebra Group, On Kostant's theorem for Lie algebra cohomology; X. He -- $G$-stable pieces and partial flag varieties; L. Ji -- Steinberg representations and duality properties of arithmetic groups, mapping class groups, and outer automorphism groups of free groups; S. Kumar, G. Lusztig, and D. Prasad -- Characters of simplylaced nonconnected groups versus characters of nonsimplylaced connected groups; G. Liu -- Classification of finite-dimensional basic Hopf algebras according to their representation type; G. Lusztig -- Twelve bridges from a reductive group to its Langlands dual; B. J. Parshall and L. L. Scott -- Some new highest weight categories; I. Pop and A. Stolin -- Classification of quasi-trigonometric solutions of the classical Yang-Baxter equation; C. M. Ringel -- The relevance and the ubiquity of Prufer modules; A. Savage -- Quivers and the Euclidean group; S. Shang and Y. Gao -- $\mathfrak {eu}_2$-Lie admissible algebras and Steinberg unitary Lie algebras; T. Shoji -- Lusztig's conjecture for finite classical groups with even characteristic; Y. Su -- A survey on quasifinite representations of Weyl type Lie algebras; N. Xi -- Maximal and primitive elements in baby Verma modules for type $B_2$; Y.-F. Yao and B. Shu -- Irreducible representations of the special algebras in prime characteristic.