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Book ChapterDOI

On Computability of Navier-Stokes’ Equation

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TLDR
A suitable encoding is carefully constructed for the space of solenoidal vector fields in the \(L_q\) sense over the \(d\)-dimensional open unit cube with zero boundary condition to render both the Helmholtz projection and the semigroup generated by the Stokes operator uniformly computable in the case of q=2.
Abstract
We approach the question of whether the Navier-Stokes Equation admits recursive solutions in the sense of Weihrauch’s Type-2 Theory of Effectivity: A suitable encoding (“representation”) is carefully constructed for the space of solenoidal vector fields in the \(L_q\) sense over the \(d\)-dimensional open unit cube with zero boundary condition. This is shown to render both the Helmholtz projection and the semigroup generated by the Stokes operator uniformly computable in the case \(q=2\).

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Citations
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Journal ArticleDOI

On the computational complexity of the Dirichlet Problem for Poisson's Equation

TL;DR: It is established that rigorously solving the Dirichlet Problem for Poisson's Equation is in a precise sense ‘complete’ for the complexity class P and thus as hard or easy as parametric Riemann integration.
Proceedings ArticleDOI

Bounded time computation on metric spaces and banach spaces

TL;DR: In this article, the authors extend Kawamura and Cook's framework for computational complexity for operators in analysis to metric spaces via representations, where time is measured in the length of the input encodings and the output precision.
Book ChapterDOI

Towards Computational Complexity Theory on Advanced Function Spaces in Analysis

TL;DR: The guide is relativization: Permitting arbitrary oracles on continuous universes reduces computability to topology and computational complexity to metric entropy in the sense of Kolmogorov.
Book ChapterDOI

Computability of the Solutions to Navier-Stokes Equations via Effective Approximation

TL;DR: The question of whether the Navier-Stokes Equation admits recursive solutions in the sense of Weihrauch’s Type-2 Theory of Effectivity is approached and a natural encoding is constructed for the space of divergence-free vector fields on 2-dimensional open square.
Posted Content

Computability of the Solutions to Navier-Stokes Equations via Recursive Approximation

TL;DR: This paper approaches the question of whether the Navier-Stokes Equation admits recursive solutions in the sense of Weihrauch's Type-2 Theory of Effectivity and establishes the computability results.
References
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Book

Finite Element Methods for Navier-Stokes Equations: Theory and Algorithms

TL;DR: This paper presents the results of an analysis of the "Stream Function-Vorticity-Pressure" Method for the Stokes Problem in Two Dimensions and its applications to Mixed Approximation and Homogeneous Stokes Equations.
Book

Computability in analysis and physics

TL;DR: This book represents the first treatment of computable analysis at the graduate level within the tradition of classical mathematical reasoning and is sufficiently detailed to provide an introduction to research in this area.
Journal ArticleDOI

The wave equation with computable initial data such that its unique solution is not computable

TL;DR: In this paper, it was shown that all non-computable solutions of the wave equation are of the type commonly referred to as weak solutions, i.e., although continuous, they are not twice differentiable at all points.
Journal ArticleDOI

Computability and Recursion

TL;DR: After a careful historical and conceptual analysis of computability and recursion, several recommendations are made about preserving the intensional differences between the concepts of “computability” and “recursion.”
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