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In mathematics, in the field of combinatorics, the q-Vandermonde identity is a q-analogue of the Chu–Vandermonde identity. Using standard notation for q-binomial coefficients, the identity states that
The nonzero contributions to this sum come from values of j such that the q-binomial coefficients on the right side are nonzero, that is, max ≤ j ≤ min.
A q-analogue of the Chu–Vandermonde identity.
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