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 Oct 22 answered Cat Dog problem using integration Oct 22 accepted Counting integer partitions of n into exactly k distinct parts size at most M Mar 17 accepted A “generalized” exponential power series Mar 17 comment A “generalized” exponential power series $\Gamma(a,x)$ is the incomplete gamma Mar 17 revised A “generalized” exponential power series deleted 83 characters in body Mar 17 comment A “generalized” exponential power series @Alex - "hypergeometric" gives me a direction - it would then be something like $_{1}F_{1}(1;\alpha;x)$, thank you! Mar 17 asked A “generalized” exponential power series Jan 22 revised Counting integer partitions of n into exactly k distinct parts size at most M solution found - but explanation needed Jan 21 revised Counting integer partitions of n into exactly k distinct parts size at most M minor title change Jan 21 asked Counting integer partitions of n into exactly k distinct parts size at most M Dec 11 asked Generating function for the characteristic function of primes Jul 25 answered Schonhageâ€“Strassen algorithm Jul 25 comment Large numbers calculation Another very good book is Modern Computer Algebra by Joachim von zur Gathen. It goes however well beyond number representations. Jul 23 awarded Scholar Jul 23 accepted Diophantine Equation: $xy+ax+by+c=0$ Jul 23 comment Diophantine Equation: $xy+ax+by+c=0$ Right, thanks! That's where I started - I was hoping to factor $N = a^2+r = (a-x)(a+y)$ Jul 23 comment Diophantine Equation: $xy+ax+by+c=0$ That's what I was looking for. And $x^2-y^2=c$ would be a Pell's equation, that could not be easily solved, could it? Jul 23 awarded Editor Jul 23 awarded Supporter Jul 23 revised Diophantine Equation: $xy+ax+by+c=0$ edited body; edited title