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 Mar17 accepted A “generalized” exponential power series Mar17 comment A “generalized” exponential power series $\Gamma(a,x)$ is the incomplete gamma Mar17 revised A “generalized” exponential power series deleted 83 characters in body Mar17 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! Mar17 asked A “generalized” exponential power series Jan22 revised Counting distinct restricted integer partitions of $n$ into exactly $k$ distinct parts less or equal then $M$ solution found - but explanation needed Jan21 revised Counting distinct restricted integer partitions of $n$ into exactly $k$ distinct parts less or equal then $M$ minor title change Jan21 asked Counting distinct restricted integer partitions of $n$ into exactly $k$ distinct parts less or equal then $M$ Dec11 asked Generating function for the characteristic function of primes Jul25 answered Schonhageâ€“Strassen algorithm Jul25 comment Large numbers calculation Another very good book is Modern Computer Algebra by Joachim von zur Gathen. It goes however well beyond number representations. Jul23 awarded Scholar Jul23 accepted Diophantine Equation: $xy+ax+by+c=0$ Jul23 comment Diophantine Equation: $xy+ax+by+c=0$ Right, thanks! That's where I started - I was hoping to factor $N = a^2+r = (a-x)(a+y)$ Jul23 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? Jul23 awarded Editor Jul23 awarded Supporter Jul23 revised Diophantine Equation: $xy+ax+by+c=0$ edited body; edited title Jul23 comment Diophantine Equation: $xy+ax+by+c=0$ Oh,yes, thank you, it should read xy+ax+by+c=0. Jul22 awarded Student