Bijections for rhombic alternative tableaux · GT LaBRI 27 novembre 2015 Xavier Viennot CNRS,...

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GT LaBRI27 novembre 2015

Xavier ViennotCNRS, LaBRI,

Bordeaux, France

Bijections forrhombic alternative tableaux

(work with Olya Mandelshtam, Berkeley)

rappel:résumé de l’exposé précédent

«assemblées» and species

petit rappel

from «assemblées» of permutationsto

rhombic alternative tableaux

7

9,10

1

7

7 7 7

7 7

1

222

1

1

1,2

1,21,2

1,21,2

12

12

12

1010

11

9,109,10

11

11

11

8

8

5 5 55

6

9

9

9

3 3

∅ ∅

∅ ∅

8,9,10,11

8,9,10,11

8,9,10,11

5,65,6

5,6

5,6

(4)

8,9,10

from rhombic alternative tableauxto

assemblée of permutations

bijection

assemblée of permutations

(subset of r elements among n ) x (r-truncated subexceedant functions)

further enumerative results

tree-like rhombic tableaux

further work:

relation withKoorwinder-Macdonald polynomials

Thank you !