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Deformation of Weyl Modules and Generalized Parking Functions

B. Feigin·S. Loktev
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Abstract

Local Weyl modules over two-dimensional currents with values in $gl_r$ are deformed into spaces with bases related to parking functions. Using this construction we 1) propose a simple proof that dimension of the space of diagonal coinvariants is not less than the number of parking functions; 2) describe the limits of Weyl modules in terms of semi-infinite forms and find the limits of characters; 3) propose a lower bound and state a conjecture for dimensions of Weyl modules with arbitrary highest weights. Also we express characters of deformed Weyl modules in terms of $\rho$-parking functions and the Frobenius characteristic map.

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B. Feigin, S. Loktev. 2003-12-08. Deformation of Weyl Modules and Generalized Parking Functions. https://arxiv.org/abs/math/0312158

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