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Numerical Stability of Extended-Domain Spectral Collocation: Floating-Point Regularization and an Equilibrium Law for the Frame Constants Z6WA2R0J50

URIm2://res/Z6WA2R0J50
Kindpreprint
CreatorsPo-Yi Wu
Date2026-10-09
MSC65-XX
Subjectsarxiv math.NA, arxiv cs.NA
Scopein

Expressions

e1: version, preprint

Languageen
Date2026-10-09
IdsarXiv 2610.13222, zbl_id 903205768

Items in this resource

The mentions of the inventory that name this resource. Each name links to the card of its inventory row.

ItemKindWhereSource
Explicit Lower Bound on the Leakage Along the Tailstatementtheorem 2.34arxiv
Envelopes of Prescribed Shapestatementlemma E.2arxiv
Lebesgue Constantdefinitiondefinition 2.5arxiv
Continuous Green's Functions and Inverse Normsstatementproposition A.2arxiv
Compounding of the Frame Instabilitystatementtheorem 8.1arxiv
The Dirichlet Problem on a Boxstatementlemma A.3arxiv
Envelopes of Bounded Densitiesstatementlemma D.3arxiv
Exact Representation of the Interpolatory Solutionstatementtheorem 2.8arxiv
Exponential Ill-Conditioningstatementcorollary 2.15arxiv
Lower Bound at the Nodal Levelstatementcorollary 6.6arxiv
The One-Dimensional Dirichlet Problemstatementlemma A.1arxiv
Geometric Convergence Forces Exponential Instabilitystatementproposition 2.10arxiv
Dimensionsstatementlemma 3.1arxiv
Discrete Potentialsstatementlemma B.2arxiv
Equilibrium Problem of the Taildefinitiondefinition 2.22arxiv
Two Forms of a Sharp Power Lawstatementlemma 6.5arxiv
Exponential Decay of the Smallest Singular Valuestatementlemma 4.4arxiv
Configurations Refute the Sharp Power Lawstatementcorollary 6.7arxiv
Leakage and Restricted Marcinkiewicz--Zygmund Constantsdefinitiondefinition 2.6arxiv
Norm of the Test Functionstatementlemma D.5arxiv
The Node Potential in Closed Formstatementlemma 4.1arxiv
The Start of the Tailstatementtheorem 2.30arxiv
Monotonicity of the Ratesstatementlemma 6.10arxiv
A Lower Bound Through a Test Functionstatementlemma D.6arxiv
Unisolvence Criterion for the Poisson Operatorstatementlemma 3.2arxiv
The Self-Dual Extensionstatementcorollary 2.28arxiv
Competitors of Moderate Coefficient Norm in the Test Spacestatementtheorem 2.20arxiv
Trial Space with Boundary Conditions, Test Spacedefinitiondefinition 2.3arxiv
Certified Configurations on Both Sides of the Critical Extensionstatementcorollary 9.2arxiv
Lattice Productsstatementlemma 6.3arxiv
Piecewise-Uniform Configurationdefinitiondefinition 2.33arxiv
Discretization of the Equilibrium Measurestatementlemma 6.11arxiv
Modulus of Continuity of $U_\omega$statementlemma B.4arxiv
The Boundary Layerstatementlemma E.1arxiv
A Priori Bounds on the Two Constantsstatementproposition 2.18arxiv
The Tail Lawstatementtheorem 2.24arxiv
Norms of the Lagrange Functions of $V_N$statementproposition 4.3arxiv
Certified Levels of the Sharp Exponentstatementcorollary 6.8arxiv
Sharpness of the Explicit Boundsstatementcorollary 2.37arxiv
Leakage Exponent at the End of the Spectrumstatementcorollary 2.13arxiv
Unisolvence in the Trial Framestatementlemma 4.2arxiv
Growth Rate of the Test-Space Lebesgue Constantstatementcorollary 2.26arxiv
Modal Phase Structure of the Test Spacestatementlemma 3.3arxiv
Growth Rates of the Lebesgue Constant and of the Inverse Smallest Singular Valuestatementtheorem 2.12arxiv
Duality of the Exponentstatementproposition 2.14arxiv
Exact Error Identity and Lebesgue Boundstatementcorollary 2.9arxiv
Properties of the Tail Lawstatementproposition 2.25arxiv
Riemann Sums with a Logarithmic Singularitystatementlemma B.1arxiv
Interpolation Configurationdefinitiondefinition 2.35arxiv
Endpoint Exponent and Extension Fractionstatementproposition 2.29arxiv
The Layer and the Gapstatementcorollary 2.32arxiv
Column Normsstatementlemma C.2arxiv
Nodal Norms of Shifted Sinesstatementlemma C.1arxiv
Lagrange Polynomialsstatementlemma B.3arxiv
Elementary Properties of the Clausen Functionstatementlemma A.4arxiv
Regularized Least Squares, a Discrete Counterpartstatementlemma A.5arxiv
Error of Regularized Oversampled Collocationstatementtheorem 7.2arxiv
Coefficient Normstatementlemma D.4arxiv
Exact Arithmetic, Regularized Solutions, and Backward-Stable Solversstatementcorollary 2.17arxiv
Unisolvence for the Poisson Operatorstatementproposition 2.11arxiv
Lebesgue-Type Bounds on the Two Constantsstatementproposition 2.19arxiv
Polynomial Form of the Framestatementlemma 2.7arxiv
Modulus of Continuity of the Envelopestatementlemma D.2arxiv
An Extremal Problem for the Tailstatementproposition 6.9arxiv
Computed Solution as Exact Collocation of Perturbed Datastatementproposition 5.1arxiv
Bound Uniform in the Conditioning for Backward-Stable Solversstatementcorollary 2.21arxiv
Discrete Green's Functionstatementcorollary 3.7arxiv
Two-Constant Boundstatementtheorem 2.16arxiv
Interpolatory and Oversampled Regimesstatementcorollary 7.3arxiv
The Equilibrium Measure of the Tailstatementproposition 2.23arxiv
Lagrange Polynomials of an Interpolation Configurationstatementlemma D.7arxiv
Exact Representation in $d$ Dimensionsstatementtheorem 8.2arxiv
The Critical Extensionstatementcorollary 2.31arxiv
A Minimum Principle for Potentialsstatementlemma 6.2arxiv
Boundary Correctionstatementlemma 6.4arxiv
Interpolatory Collocationdefinitiondefinition 2.2arxiv
Chebyshev Expansion of the Envelopestatementlemma 6.1arxiv
Laplacian Eigenbasis on the Extended Domaindefinitiondefinition 2.1arxiv
Marcinkiewicz--Zygmund Constant of the Test Spacedefinitiondefinition 7.1arxiv
Riemann Sums on an Arcstatementlemma D.1arxiv
Upper Bound Along the Tail by Lagrange Interpolationstatementtheorem 2.36arxiv
Duality of the Tail Lawstatementtheorem 2.27arxiv
Chebyshev Polynomials on Bernstein Ellipsesstatementlemma 5.2arxiv

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