Results 1 to 10 of about 54,203 (295)
On polynomial approximation in the complex plane with application to conformal mapping [PDF]
Mathematics of Computation, 1985 We consider the selection of polynomial bases for polynomial approximation of analytic functions on bounded simply connected regions in the complex plane. While a monomial basis may be very ill-conditioned, we show that a basis of Lagrange polynomials with Fejér points as nodes is well-conditioned.
Lothar Reichel
openaire +2 more sources
Approximation by complex Stancu Beta operators of second kind in semidisks
Journal of Numerical Analysis and Approximation Theory, 2013 In this paper, the exact order of simultaneous approximation and Voronovskaja kind results with quantitative estimate for the complex Stancu Beta operator of second kind attached to analytic functions of exponential growth in semidisks of the right
Sorin G. Gal, Vijay Gupta
doaj +4 more sources
A Note on Rational Approximation with Respect to Metrizable Compactifications of the Plane [PDF]
Extracta Mathematicae, 2016 In the present note we examine possible extensions of Runge, Mergelyan and Arakelian Theorems, when the uniform approximation is meant with respect to the metric ρ of a metrizable compactification (S, ρ) of the complex plane C.
M. Fragoulopoulou, V. Nestoridis
doaj +1 more source
Moments of Real, Respectively of Complex Valued Functions, Approximation and Applications
MathematicsThe first aim of this study is to point out new aspects of approximation theory applied to a few classes of holomorphic functions via Vitali’s theorem.
Cristian Octav Olteanu
doaj +1 more source
On the Reflection of a Spherical Sound Wave from a Finite Size Surface
Applied SciencesRoom acoustics computer models based on geometrical acoustics usually handle the sound reflections by the assumption of plane waves. However, if the sound source is a point source, which is usually the case, the spherical wave reflection would be more ...
Jens Holger Rindel
doaj +1 more source
High-energy photoemission final states beyond the free-electron approximation
Nature Communications, 2023 Three-dimensional (3D) electronic band structure is fundamental for understanding a vast diversity of physical phenomena in solid-state systems, including topological phases, interlayer interactions in van der Waals materials, dimensionality-driven phase
V. N. Strocov +9 more
doaj +1 more source
Asymptotic analysis of flow near a glacier terminus
Journal of Glaciology, 2018 The non-linearly viscous ice flow in the vicinity of a glacier terminus, an observation region, depends crucially on the upstream flow as well as on the local surface and bed conditions.
L. W. MORLAND
doaj +1 more source
Holographic equilibration in confining gauge theories under external magnetic fields
Nuclear Physics B, 2017 We investigate the effect of external magnetic fields on equilibration in the improved holographic QCD theory in the deconfined phase using the AdS/CFT correspondence.
T. Demircik, U. Gürsoy
doaj +1 more source
Evanescent waves and deaf bands in sonic crystals
AIP Advances, 2011 The properties of sonic crystals (SC) are theoretically investigated in this work by solving the inverse problem k(ω) using the extended plane wave expansion (EPWE).
V. Romero-García +2 more
doaj +1 more source
MathematicsThe paper expands the finite difference method to the complex plane, and thus obtains an improvement in the resolution of differential equations with an increase in numerical precision and a generalization in the mathematical modeling of problems.
Ana Laura Mendonça Almeida Magalhães +6 more
doaj +1 more source