The partition algebra is an associative algebra with a basis of set-partition diagrams and multiplication given by diagram concatenation. It contains as subalgebras a large class of diagram algebras including the Brauer, planar partition, rook monoid, rook-Brauer, Temperley–Lieb, Motzkin, planar rook monoid, and symmetric group algebras. We construct the irreducible modules of these algebras in three isomorphic ways: as the span of diagrams in a quotient of the left regular representation; as the span of symmetric diagrams on which the algebra acts by conjugation twisted with an irreducible symmetric group representation; and on a basis indexed by set-partition tableaux such that diagrams in the algebra act combinatorially on tableaux. The second representation is analogous to the Gelfand model and the third is a generalization of Young’s natural representation of the symmetric group on standard tableaux. The methods of this paper work uniformly for the partition algebra and its diagram subalgebras. As an application, we express the characters of each of these algebras as nonnegative integer combinations of symmetric group characters whose coefficients count fixed points under conjugation.
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Mots-clés : Set partitions, tableaux, partition algebra, symmetric group, Brauer algebra, Temperley–Lieb algebra, Motzkin algebra, Rook monoid.
Halverson, Tom 1; Jacobson, Theodore N. 2
@article{ALCO_2020__3_2_509_0, author = {Halverson, Tom and Jacobson, Theodore N.}, title = {Set-partition tableaux and representations of diagram algebras}, journal = {Algebraic Combinatorics}, pages = {509--538}, publisher = {MathOA foundation}, volume = {3}, number = {2}, year = {2020}, doi = {10.5802/alco.102}, language = {en}, url = {https://alco.centre-mersenne.org/articles/10.5802/alco.102/} }
TY - JOUR AU - Halverson, Tom AU - Jacobson, Theodore N. TI - Set-partition tableaux and representations of diagram algebras JO - Algebraic Combinatorics PY - 2020 SP - 509 EP - 538 VL - 3 IS - 2 PB - MathOA foundation UR - https://alco.centre-mersenne.org/articles/10.5802/alco.102/ DO - 10.5802/alco.102 LA - en ID - ALCO_2020__3_2_509_0 ER -
%0 Journal Article %A Halverson, Tom %A Jacobson, Theodore N. %T Set-partition tableaux and representations of diagram algebras %J Algebraic Combinatorics %D 2020 %P 509-538 %V 3 %N 2 %I MathOA foundation %U https://alco.centre-mersenne.org/articles/10.5802/alco.102/ %R 10.5802/alco.102 %G en %F ALCO_2020__3_2_509_0
Halverson, Tom; Jacobson, Theodore N. Set-partition tableaux and representations of diagram algebras. Algebraic Combinatorics, Volume 3 (2020) no. 2, pp. 509-538. doi : 10.5802/alco.102. https://alco.centre-mersenne.org/articles/10.5802/alco.102/
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