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Questions
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$f(x) \ne g(x)$ but $f(f(x))=g(g(x))$ - is there a name/some discussion of this property?

aug 30 11 at 8:30 Gottfried Helms 1,351●1●3●10

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mertens-function in the light of divergent summation - what summation method were best adapted

jan 28 12 at 22:21 remote 1

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What are conditions to make f(x) defined by f(x)=f(x-1)*x + 1/e unique(for instance convex)?

nov 24 10 at 15:22 MathOverflow♦ 1●2●3

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Efficient (divergent) summation for sum of zetas at negative arguments?

apr 19 at 22:51 i707107 829●3●8

 
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Can the relative count of the primefactors in $\small \lim_{w\to\infty}\prod_{k=1}^w (p_k-1) $ be determined analytically?

jun 20 at 1:00 Gottfried Helms 1,351●1●3●10

 
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An infinite set of identities using Stirling numbers 1st kind - are they all zero?

oct 7 at 6:48 Gottfried Helms 1,351●1●3●10

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How to check numerical precision of my computation of Stieltjes-constants?

aug 27 at 6:22 Gottfried Helms 1,351●1●3●10

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Is that series-transformation known in the context of divergent summation?

mar 10 11 at 16:16 Gottfried Helms 1,351●1●3●10

 
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For an approach to the Hadamard-matrix-problem: is there a proof, that the iterative plane-wise orthogonal rotations (Quartimax/Varimax) converge to global maximum?

mar 8 12 at 16:13 Gerhard Paseman 811●1●5●5

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Alternating sums of powers of the lngamma ($\small f_p(x) = \sum \log(k!)^p x^k $ at $\small x=-1$)

jan 31 12 at 11:34 Gottfried Helms 1,351●1●3●10

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