Results 71 to 80 of about 431,788 (272)
On exact rate of convergence of row sequences of multipoint Hermite-Padé approximants
Demonstratio MathematicaIn this article, we analyze a rate of attraction of poles of an approximated function to poles of incomplete multipoint Padé approximants and use it to derive a sharp bound on the geometric rate of convergence of multipoint Hermite-Padé approximants to a
Bosuwan Nattapong
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Approximating the Distribution of the Instrumental Variables Estimator when the Concentration Parameter is Small. [PDF]
This paper presents a new approximation to the exact sampling distribution of the instrumental variables estimator in simultaneous equations models. It differs from many of the approximations currently available, Edgeworth expansions for example, in that
C. L. Skeels, D. S. Poskitt
core
Diophantine approximation in Banach spaces [PDF]
, 2016 In this paper, we extend the theory of simultaneous Diophantine approximation to infinite dimensions. Moreover, we discuss Dirichlet-type theorems in a very general framework and define what it means for such a theorem to be optimal.
Fishman, Lior +2 more
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Effective simultaneous approximability of reals
Theoretical Computer Science, 2002 The effective simultaneous approximability of real vectors and sets of reals is studied. A hierarchy of real vectors based on the Kolmogorov complexity of computable approximations is constructed. We prove that the hierarchy is nontrivial at the bottom levels but collapses on the top levels.
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Simultaneous Frobenius–Padé approximants
Journal of Computational and Applied Mathematics, 2005 The authors consider simultaneous rational approximation with common denominator in the sense of the so called `German Polynomials' [cf. \textit{K. Mahler}, Perfect Systems, Comp. Math. 19, 95--166 (1968; Zbl 0168.31303)], constructed from formal power series \((f^1,\dots,f^d)\) in orthogonal polynomials \(\{P_k\}_{k\geq 0}\) with respect to a weight \(
Matos, Ana C., Van Iseghem, Jeannette
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Molecular Oncology, EarlyView.Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson +9 more
wiley +1 more source
Molecular Oncology, EarlyView.Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau +36 more
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Molecular Oncology, EarlyView.Keratin 19 (KRT19) is overexpressed in high‐grade serous ovarian cancer with high levels of Kallikrein‐related peptidases (KLK) 4–7 and is associated with poor survival. In vivo analyses demonstrate that elevated KRT19 increases peritoneal tumour burden.
Sophia Bielesch +13 more
wiley +1 more source
Weighted Simultaneous Approximation of the Linear Combinations of Baskakov Operators
Complexity, 2020 In this paper, the approximation property of the linear combinations of Baskakov operators is investigated by using a Jacobi weight function. Moreover, both the positive and inverse theorems for the weighted simultaneous approximation of the linear ...
Xiao-jun Tang, Xin-chang Wang, Hua Yi
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Somatic mutational landscape in von Hippel–Lindau familial hemangioblastoma
Molecular Oncology, EarlyView.The causes of central nervous system (CNS) hemangioblastoma in Von Hippel–Lindau (vHL) disease are unclear. We used Whole Exome Sequencing (WES) on familial hemangioblastoma to investigate events that underlie tumor development. Our findings suggest that VHL loss creates a permissive environment for tumor formation, while additional alterations ...
Maja Dembic +5 more
wiley +1 more source