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We construct examples of commuting ordinary scalar differential operatorswith polynomial coefficients that are related to a spectral curve of anarbitrary genus g and to an arbitrary even rank r = 2k, and also to anarbitrary rank of the form r = 3k, of the vector bundle of commoneigenfunctions of the commuting operators over the spectral curve.

On commutative subalgebras of the Weyl algebra that are related to commuting operators of arbitrary rank and genus