Geodesic
Weighted words at degree two. II: Flat partitions, regular partitions, and application to level one perfect crystals
Isaac Konan1
1University Claude Bernard Lyon 1
The electronic journal of combinatorics, Tome 29 (2022) no. 1
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In a recent work, Keith and Xiong gave a refinement of Glaisher's theorem by using a Sylvester-style bijection. In this paper, we introduce two families of colored partitions, flat and regular partitions, and generalize the bijection of Keith and Xiong to these partitions. We then state two results, the first at degree one, where partitions have parts with primary colors, and the second result at degree two for secondary-colored partitions, using the result of the first paper of this series on Siladić's identity. These results allow us to easily retrieve the Frenkel-Kac character formulas of level one standard modules for the type $A _{2n}^{(2)}, D_{n+1}^{(2)}$ and B_n^{(1)}$ , and also to make the connection between the result stated in paper one and the representation theory.
DOI : 10.37236/10442
Classification : 11P84, 05A19, 17B37
Mots-clés : flat partitions, Glaisher's theorem, colored partitions

Isaac Konan  1

1 University Claude Bernard Lyon 1 
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     author = {Isaac Konan},
     title = {Weighted words at degree two. {II:} {Flat} partitions, regular partitions, and application to level one perfect crystals},
     journal = {The electronic journal of combinatorics},
     year = {2022},
     volume = {29},
     number = {1},
     doi = {10.37236/10442},
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     url = {http://geodesic.mathdoc.fr/articles/10.37236/10442/}
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Isaac Konan. Weighted words at degree two. II: Flat partitions, regular partitions, and application to level one perfect crystals. The electronic journal of combinatorics, Tome 29 (2022) no. 1. doi: 10.37236/10442

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