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Unstructured Space-Time Finite Element Methods for Optimal Control of Parabolic Equations

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TLDR
In this paper, a space-time finite element method was proposed for the numerical solution of parabolic optimal control problems using Babuska's polynomial-time method on fully unstructured simplicial space time meshes.
Abstract
This work presents and analyzes space-time finite element methods on fully unstructured simplicial space-time meshes for the numerical solution of parabolic optimal control problems. Using Babuska'...

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Space-Time Finite Element Discretization of Parabolic Optimal Control Problems with Energy Regularization

TL;DR: It is emphasized that the energy regularization results in a more localized control with sharper contours for discontinuous target functions, which is demonstrated by a comparison with an $L^2$ regularization and with a sparse optimal control approach.
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Semi-analytic integration for a parallel space-time boundary element method modeling the heat equation.

TL;DR: This work provides temporal antiderivatives of the heat kernel necessary for the assembly of BEM matrices and the evaluation of the representation formula allowing researchers to reuse the formulae and BEM routines straightaway.
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Fully and Semi-Automated Shape Differentiation in NGSolve

TL;DR: This approach combines the mathematical Lagrangian approach for differentiating PDE-constrained shape functions with the automated differentiation capabilities of NGSolve to allow for either a more custom-like or black-box–like behaviour of the software.
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Solving Maxwell's Eigenvalue Problem via Isogeometric Boundary Elements and a Contour Integral Method

TL;DR: This work solves Maxwell's eigenvalue problem via isogeometric boundary elements and a contour integral method and discusses the analytic properties of the discretisation, and outlines the implementation.
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Space-time finite element discretization of parabolic optimal control problems with energy regularization

TL;DR: In this paper, the authors analyzed space-time finite element methods for the numerical solution of distributed parabolic optimal control problems with energy regularization in the Bochner space and proved unique solvability in the continuous case.
References
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Functional a posteriori error estimates for time-periodic parabolic optimal control problems

TL;DR: A posteriori estimates of the functional type are derived, which are easily computable and provide guaranteed upper bounds for the state and co-state errors as well as for the cost functional.
Journal ArticleDOI

Functional A Posteriori Error Estimates for Time-Periodic Parabolic Optimal Control Problems

TL;DR: In this paper, a posteriori error analysis of multiharmonic finite element approximations to distributed optimal control problems with time-periodic state equations of parabolic type is presented.
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Optimal control of a class of reaction–diffusion systems

TL;DR: The optimal control of a system of nonlinear reaction–diffusion equations is considered that covers several important equations of mathematical physics that develop traveling wave fronts, spiral waves, scroll rings, or propagating spot solutions and the existence of optimal controls is proved.
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Aspects of Solvers for Large-Scale Coupled Problems in Porous Media

TL;DR: This work summarizes solution strategies for discrete systems occurring in the simulation of processes in the subsurface, focusing on scalable solvers for large and coupled systems.
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