The degree of the Hilbert-Poincar\'e polynomial of PBW-graded modules

In this note, we study the Hilbert-Poincar\'e polynomials for the PBW-graded of simple modules for a simple complex Lie algebra. The computation of their degree can be reduced to modules of fundamental highest weight. We provide these degrees explicitly.

[1]  Ghislain Fourier,et al.  New homogeneous ideals for current algebras: filtrations, fusion products and Pieri rules , 2014, 1403.4758.

[2]  Martina Lanini,et al.  Degenerate flag varieties and Schubert varieties: a characteristic free approach , 2015, 1502.04590.

[3]  Feigin Evgeny,et al.  Extremal part of the PBW-filtration and E-polynomials , 2013 .

[4]  Ghislain Fourier,et al.  PBW-degenerated Demazure modules and Schubert varieties for triangular elements , 2014, J. Comb. Theory, Ser. A.

[5]  Evgeny Feigin,et al.  Nonsymmetric Macdonald polynomials, Demazure modules and PBW filtration , 2014, 1407.6316.

[6]  Evgeny Feigin,et al.  PBW filtration and bases for irreducible modules in type An , 2010, 1002.0674.

[7]  J. Humphreys Introduction to Lie Algebras and Representation Theory , 1973 .

[8]  Evgeny Feigin,et al.  PBW-filtration over ℤ and Compatible Bases for V ℤ ( λ ) in Type A n and C n , 2013 .

[9]  Evgeny Feigin,et al.  PBW filtration and bases for symplectic Lie algebras , 2010, 1010.2321.

[10]  Martina Lanini,et al.  Degenerate flag varieties of type A and C are Schubert varieties , 2014, 1403.2889.

[11]  A. Gornitskii Essential signatures and canonical bases of irreducible representations of the group G2 , 2015 .

[12]  B. Kostant A FORMULA FOR THE MULTIPLICITY OF A WEIGHT. , 1958, Proceedings of the National Academy of Sciences of the United States of America.

[13]  EVGENY FEIGIN,et al.  FAVOURABLE MODULES: FILTRATIONS, POLYTOPES, NEWTON–OKOUNKOV BODIES AND FLAT DEGENERATIONS , 2013, 1306.1292.

[14]  Evgeny Feigin,et al.  ${\mathbb G}_a^M$ degeneration of flag varieties , 2010, 1007.0646.

[15]  Ghislain Fourier,et al.  Minuscule Schubert Varieties: Poset Polytopes, PBW-Degenerated Demazure Modules, and Kogan Faces , 2014, 1410.1126.

[16]  Teodor Backhaus,et al.  PBW filtration: Feigin-Fourier-Littelmann modules via Hasse diagrams , 2014 .