Punctured plane partitions and the q-deformed Knizhnik-Zamolodchikov and Hirota equations

We consider partial sum rules for the homogeneous limit of the solution of the q-deformed Knizhnik-Zamolodchikov equation with reflecting boundaries in the Dyck path representation of the Temperley-Lieb algebra. We show that these partial sums arise in a solution of the discrete Hirota equation, and prove that they are the generating functions of @t^2-weighted punctured cyclically symmetric transpose complement plane partitions where @t=-(q+q^-^1). In the cases of no or minimal punctures, we prove that these generating functions coincide with @t^2-enumerations of vertically symmetric alternating sign matrices and modifications thereof.

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