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how can I find the coefficient of $x^ny^m$ of following series $$\frac{\log\big(\frac{1}{1-xy}\big)}{(1-x)(1-y)(1-xy)}$$ and $$ \frac{\log(\frac{1}{1-x})}{(1-x)(1-y)(1-xy)}$$ where $1 \leq m \leq n$

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    You can write this functions as a Cauchy product of four series. Why do you want $m\leq n$?2012-07-22
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    I am trying to understand this paper on partial quick sort. http://www.lsi.upc.edu/~conrado/research/reports/ALCOMFT-TR-03-50.pdf . Page no 3 (F(z,u)*=)2012-07-22

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