Search Results - abstracts approximation theory (approximation in formed linear spaces and other abstracts spaces)

Simultaneous approximation and interpolation in weighted spaces

Authors: Márcia Sayuri Kashimoto João B. Prolla

Source: Rendiconti del Circolo Matematico di Palermo. 51:485-494

Subject Terms: Abstract approximation theory (approximation in normed linear spaces and other abstract spaces), 0101 mathematics, 01 natural sciences

File Description: application/xml

Access URL: https://link.springer.com/content/pdf/10.1007/BF02871856.pdf
https://link.springer.com/article/10.1007/BF02871856

Real and Complex Linear Extensions for Locally Convex Cones: Real and complex linear extensions for locally convex cones

Authors: Walter Roth

Source: Journal of Functional Analysis. 151:437-454

Subject Terms: Axiomatic and generalized convexity, Convex sets in topological linear spaces, Choquet theory, right-distributivity, regular linear functionals, integral representation, 01 natural sciences, locally convex cone, Korovkin-type theorems, Abstract approximation theory (approximation in normed linear spaces and other abstract spaces), associativity, 0101 mathematics, locally convex cones, locally convex ordered topological vector space, Analysis, Ordered topological linear spaces, vector lattices

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Access URL: https://core.ac.uk/display/82766838
https://www.sciencedirect.com/science/article/abs/pii/S0022123697931426
https://www.sciencedirect.com/science/article/pii/S0022123697931426

Absolute projection constant of the linear functions in a Lebesgue space

Authors: Bruce L. Chalmers

Source: Constructive Approximation. 4:107-110

Subject Terms: Abstract approximation theory (approximation in normed linear spaces and other abstract spaces), Geometry and structure of normed linear spaces, relative projection constant, 0103 physical sciences, Approximation by operators (in particular, by integral operators), 0101 mathematics, 01 natural sciences, Spaces of measurable functions (\(L^p\)-spaces, Orlicz spaces, Köthe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.), absolute projection constant

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Access URL: https://zbmath.org/4056248
https://doi.org/10.1007/bf02075451
https://link.springer.com/article/10.1007/BF02075451
https://rd.springer.com/article/10.1007/BF02075451

Characterizations of K-Functionals Built from Fractional Powers of Infinitesimal Generators of Semigroups: Characterizations of \(K\)-functionals built from fractional powers of infinitesimal generators of semigroups

Authors: Trebels Westphal

Source: Constructive Approximation. 19:355-371

Subject Terms: Abstract approximation theory (approximation in normed linear spaces and other abstract spaces), \(K\)-functionals, saturation, Interpolation between normed linear spaces, Rate of convergence, degree of approximation, \(C\)-semigroups, regularized semigroups, truncated hypersingular integrals, 0101 mathematics, semigroups of operators, 01 natural sciences, resolvents, fractional powers of infinitesimal generators

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Access URL: http://tubiblio.ulb.tu-darmstadt.de/21785/
https://link.springer.com/content/pdf/10.1007/s00365-002-0511-4.pdf
https://link.springer.com/article/10.1007%2Fs00365-002-0511-4

Problems of approximation theory in linear spaces.

Authors: Stepanets, A.

Source: Ukrainian Mathematical Journal; Jan2006, Vol. 58 Issue 1, p54-102, 49p

Subject Terms: APPROXIMATION theory, FUNCTIONAL analysis, VECTOR spaces, HILBERT space, HYPERSPACE

Democracy of quasi-greedy bases in $\boldsymbol p$ -Banach spaces with applications to the efficiency of the Thresholding Greedy Algorithm in the Hardy spaces $\boldsymbol {H_{p}({\mathbb {D}}^{d})}$.

Authors: Albiac, Fernando Ansorena, José L. Bello, Glenier

Source: Proceedings of the Royal Society of Edinburgh: Section A: Mathematics; Jun2024, Vol. 154 Issue 3, p906-928, 23p

Subject Terms: THRESHOLDING algorithms, GREEDY algorithms, HARDY spaces, APPROXIMATION theory, FUNCTIONAL analysis, DEMOCRACY

Direct and inverse theorems of approximation theory in Banach function spaces.

Authors: Vinogradov, O. L.

Source: St. Petersburg Mathematical Journal; 1/10/2025, Vol. 35 Issue 6, p907-928, 22p

Modeling of Nonlinear Systems: Method of Optimal Injections.

Authors: Torokhti, Anatoli Soto-Quiros, Pablo

Source: Mathematical & Computational Applications; Apr2025, Vol. 30 Issue 2, p26, 31p

Subject Terms: APPROXIMATION theory, FREDHOLM equations, INTEGRAL equations, OPERATOR theory, NONLINEAR systems

A Systematic Approach to General Higher-Order Majorization-Minimization Algorithms for (Non)convex Optimization.

Authors: Necoara, Ion Lupu, Daniela

Source: SIAM Journal on Optimization; 2025, Vol. 35 Issue 4, p2372-2401, 30p

Subject Terms: MATHEMATICAL optimization, OPTIMIZATION algorithms, APPROXIMATION theory, LIPSCHITZ continuity, NONCONVEX programming, SURROGATE-based optimization

INTERPOLATORY Η2-ΟΡΤΙMALITY CONDITIONS FOR STRUCTURED LINEAR TIME-INVARIANT SYSTEMS.

Authors: MLINARIĆ, PETAR BENNER, PETER GUGERCIN, SERKAN

Source: SIAM Journal on Numerical Analysis; 2025, Vol. 63 Issue 2, p949-975, 27p

Subject Terms: REDUCED-order models, APPROXIMATION theory, LINEAR systems, PARAMETRIC modeling, INTERPOLATION

Metropolis-Hasting Idea for Approximating Matrix Inverse.

Authors: Bagherpour, N. Amiri, N. Mahdavi

Source: Journal of Algorithms & Computation; Dec2024, Vol. 56 Issue 2, p151-161, 11p

Subject Terms: LINEAR systems, EQUATIONS, CONJUGATE gradient methods, APPROXIMATION theory, ALGORITHMS

APPROXIMATION BY LINEAR COMBINATIONS OF TRANSLATES OF A SINGLE FUNCTION.

Authors: DINH DŨNG VU NHAT HUY

Source: Mathematical Inequalities & Applications; Jan2022, Vol. 25 Issue 1, p169-186, 18p

Subject Terms: APPROXIMATION theory, FUNCTION spaces, UNIVARIATE analysis, PERIODIC functions, MATHEMATICAL functions

A mixed interpolation-regression approximation operator on the triangle.

Authors: De Marchi, Stefano Dell'Accio, Francesco Nudo, Federico

Source: Dolomites Research Notes on Approximation; Sep2024, Vol. 17 Issue 3, p33-44, 12p

Subject Terms: LEAST squares, APPROXIMATION theory, FINITE element method, FINITE geometries, COMPUTATIONAL geometry

Rotundity of Quotient Spaces in Metric Linear Spaces.

Authors: Garg, Shelly Grover, Harpreet K. Narang, T. D.

Source: Iranian Journal of Mathematical Sciences & Informatics; 2024, Vol. 19 Issue 2, p119-126, 8p

Subject Terms: VECTOR spaces, METRIC spaces, CONVEXITY spaces

Fast and Efficient Lunar Finite Element Gravity Model.

Authors: Nguyen, Giaky Younes, Ahmad Bani Atallah, Ahmed

Source: Applied Sciences (2076-3417); Nov2024, Vol. 14 Issue 22, p10364, 29p

Subject Terms: LUNAR surface, POLYNOMIAL approximation, APPROXIMATION theory, CHEBYSHEV polynomials, FINITE element method

Complexity and Approximation of Finding the Longest Vector Sum.

Authors: Shenmaier, V. V.

Source: Computational Mathematics & Mathematical Physics; Jun2018, Vol. 58 Issue 6, p850-857, 8p

Subject Terms: MATHEMATICAL complexes, APPROXIMATION theory, SET theory, VECTOR spaces, POLYNOMIALS

Approximation and Entropy Numbers of Embeddings Between Approximation Spaces.

Authors: Cobos, Fernando Domínguez, Óscar Kühn, Thomas

Source: Constructive Approximation; Jun2018, Vol. 47 Issue 3, p453-486, 34p

Subject Terms: EMBEDDINGS (Mathematics), VECTOR spaces, BANACH spaces, BESOV spaces, APPROXIMATION theory, COMPACT spaces (Topology)

Solving two-dimensional coupled Burgers equations via a stable hybridized discontinuous Galerkin method.

Authors: Baharlouei, S. Mokhtari, R. Chegini, N.

Source: Iranian Journal of Numerical Analysis & Optimization; 2023, Vol. 13 Issue 3, p397-425, 29p

Subject Terms: BURGERS' equation, REYNOLDS number, CRANK-Nicolson method, GALERKIN methods, APPROXIMATION theory, MATHEMATICAL formulas, NEWTON-Raphson method, NUMBER systems

Cupolets: History, Theory, and Applications.

Authors: Morena, Matthew A. Short, Kevin M.

Source: Dynamics (2673-8716); Jun2024, Vol. 4 Issue 2, p394-424, 31p

Subject Terms: DYNAMICAL systems, CHAOTIC communication, POINCARE conjecture, APPROXIMATION theory, PERTURBATION theory

Nonlinear Methods of Approximation.

Authors: Temlyakov, V. N.

Source: Foundations of Computational Mathematics; Feb2003, Vol. 3 Issue 1, p33-107, 76p

Subject Terms: NONLINEAR statistical models, APPROXIMATION theory, VECTOR spaces, STATISTICS, ALGORITHMS