Expression of special stretched 9j coefficients in terms of 5F4 hypergeometric series
Abstract
The Clebsch-Gordan coefficients or Wigner 3j symbols are known to be proportional to a 3F2(1) hypergeometric series, and Racah 6j coefficients to a 4F3(1). In general, however, non-trivial 9j symbols can not be expressed as a 5F4. In this letter, we show, using the Dougall-Ramanujan identity, that special stretched 9j symbols can be reformulated as 5F4(1) hypergeometric series.
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