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{\bf X. Ma}
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{\bf Two Finite Forms of Watson's Quintuple Product Identity and Matrix Inversion}
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Recently, Chen-Chu-Gu and Guo-Zeng found independently that Watson's
quintuple product identity follows surprisingly from two basic
algebraic identities, called finite forms of Watson's quintuple
product identity. The present paper shows that both identities are
equivalent to two special cases of the $q$-Chu-Vandermonde formula by
using the ($f,g$)-inversion.
\bye