Frenkel–Mukhin conjecture for the q-character algorithm

Let Uq(g^)U_q(\hat{\mathfrak{g}}) be a quantum affine algebra, let m+m_+ be a dominant monomial in Z[Yi,a±1]iI;aC×\mathbb{Z}[Y_{i,a}^{\pm1}]_{i\in I;\,a\in\mathbb{C}^{\times}}, and let V(m+)V(m_+) be the irreducible representation with highest weight monomial m+m_+. The Frenkel–Mukhin algorithm produces a polynomial χ(m+)\chi(m_+).

Frenkel–Mukhin conjecture. For any dominant monomial m+m_+, the algorithm never fails and stops after finitely many steps. Moreover,

χ(m+)=χq(V(m+)).\chi(m_+)=\chi_q(V(m_+)).

This conjecture asserts that the algorithm gives an effective formula for the qq-character of every irreducible representation. The source provides no resolution status.

Sources & referencesView supporting material

Primary source

Wakako Nakai and Tomoki Nakanishi, “On Frenkel-Mukhin algorithm for q-character of quantum affine algebras”, arXiv:0801.2239 (2008).

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