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pro vyhledávání: '"Ruscheweyh, Stephan"'
Denote by $\mathcal{P}_{\log}$ the set of all non-constant Pick functions $f$ whose logarithmic derivatives $f^{\, \prime}/f$ also belong to the Pick class. Let $\mathcal{U}(\Lambda)$ be the family of functions $z\cdot f(z)$, where $f \in\mathcal{P}_
Externí odkaz:
http://arxiv.org/abs/1804.03931
The Ramanujan sequence $ \{\theta_{n}\}_{n \geq 0}$, defined as $$ \theta_{0}= \frac{1}{2} \ , \ \ \ \theta_{n} = \left(\ \ \frac{e^{n}}{2} - \sum_{k=0}^{n-1} \frac{n^{k}}{k !} \ \ \right) \cdot \frac{n !}{n^{n}} \ , \ \ n \geq 1 \ ,$$ has been studi
Externí odkaz:
http://arxiv.org/abs/1605.05479
Publikováno v:
Proc. Amer. Math. Soc. 136, 3171-3176, 2008
For functions $f$ whose Taylor coefficients at the origin form a Hausdorff moment sequence we study the behaviour of $w(y):=|f(\gamma+iy)|$ for $y>0$ ($\gamma\leq1$ fixed).
Externí odkaz:
http://arxiv.org/abs/0802.2475
Autor:
Alzer, Horst, Ruscheweyh, Stephan
Publikováno v:
Proceedings of the American Mathematical Society, 2001 Sep 01. 129(9), 2655-2662.
Externí odkaz:
https://www.jstor.org/stable/2668790
Autor:
Fournier, Richard, Ruscheweyh, Stephan
Publikováno v:
Proceedings of the American Mathematical Society, 1999 Nov 01. 127(11), 3287-3294.
Externí odkaz:
https://www.jstor.org/stable/119525
Publikováno v:
Proceedings of the American Mathematical Society, 2015 Feb 01. 143(2), 717-729.
Externí odkaz:
http://www.jstor.org/stable/24507148
Autor:
Bakan, Andrew, Ruscheweyh, Stephan
Publikováno v:
In Journal of Approximation Theory August 2012 164(8):1026-1048
Autor:
Bakan, Andrew, Ruscheweyh, Stephan
Publikováno v:
Proceedings of the American Mathematical Society, 2008 Aug 01. 136(8), 2665-2674.
Externí odkaz:
http://dx.doi.org/10.1090/S0002-9939-08-09256-3
Autor:
Ruscheweyh, Stephan, Sumyk, Oksana
Publikováno v:
In Journal of Mathematical Analysis and Applications 2011 383(2):451-460