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  "body": "\n## Statement\n\nSaalschütz's theorem (Saalschütz 1890) states\n\n$${}_3F_2 (a,b, -n;c, 1+a+b-c-n;1)= \\frac{(c-a)_n(c-b)_n}{(c)_n(c-a-b)_n}.$$\n\nFor extension of this theorem, see a research paper by Rakha \u0026 Rathie. According to Andrews, it was in fact first discovered by Pfaff in 1797.\n",
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