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Gaudin's model and the generating function of the Wroński map

Inna Scherbak (2003)

Banach Center Publications

We consider the Gaudin model associated to a point z ∈ ℂⁿ with pairwise distinct coordinates and to the subspace of singular vectors of a given weight in the tensor product of irreducible finite-dimensional sl₂-representations, [G]. The Bethe equations of this model provide the critical point system of a remarkable rational symmetric function. Any critical orbit determines a common eigenvector of the Gaudin hamiltonians called a Bethe vector. In [ReV], it was shown that for generic...

Generalized reciprocity for self-adjoint linear differential equations

Ondřej Došlý (1995)

Archivum Mathematicum

Let L ( y ) = y ( n ) + q n - 1 ( t ) y ( n - 1 ) + + q 0 ( t ) y , t [ a , b ) , be an n -th order differential operator, L * be its adjoint and p , w be positive functions. It is proved that the self-adjoint equation L * p ( t ) L ( y ) = w ( t ) y is nonoscillatory at b if and only if the equation L w - 1 ( t ) L * ( y ) = p - 1 ( t ) y is nonoscillatory at b . Using this result a new necessary condition for property BD of the self-adjoint differential operators with middle terms is obtained.

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