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I am trying to implement few equations for the distribution of Chi square from the paper Castaño-Martínez and López-Blázquez (2005). In equation (5.1), I don't understand what $(p)_j$ means. Could you please explain this notation to me? Thanks

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  • $\begingroup$ Subscription access required. That doesn't rule out answers, but answers are much more likely if you gave a paragraph or so so that the notation could be seen in context. $\endgroup$ – Nick Cox Oct 31 '17 at 7:25
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I strongly suspect it is the Pochhammer symbol: http://mathworld.wolfram.com/PochhammerSymbol.html

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