Publications associées à Endomorphisme autoadjoint

Optimally Packed Chains of Bulges in Multishift QR Algorithms

The QR algorithm is the method of choice for computing all eigenvalues of a dense nonsymmetric matrix A. After an initial reduction to Hessenberg form, a QR iteration can be viewed as chasing a small bulge from the top left to the bottom right corner along ...

Association for Computing Machinery2014

Operator-Like Wavelet Bases of L-2(R-d)

Michaël Unser, John Paul Ward, Ildar Khalidov

The connection between derivative operators and wavelets is well known. Here we generalize the concept by constructing multiresolution approximations and wavelet basis functions that act like Fourier multiplier operators. This construction follows from a s ...

Springer Birkhauser2013

Operator-Like Wavelet Bases of $ L _{ 2 } $ $ (\mathbb{R} ^{ d } $ )

Michaël Unser, John Paul Ward, Ildar Khalidov

Springer US2013

Odd linking and bifurcation in gaps: the weakly indefinite case

In this paper, we consider nonlinear Schrodinger equations of the following type: -Delta u(x) + V (x) u(x) -q(x)|u(x)|sigma u(x) =lambda u(x), x is an element of R-N, u is an element of H-1(R-N) \ {0}, where N >= 2 and sigma > 0. We concentrate on situatio ...

Royal Society of Edinburgh Scotland Foundation, Cambridge2013

Convex Generalizations of Total Variation Based on the Structure Tensor with Applications to Inverse Problems

Michaël Unser, Stamatios Lefkimmiatis

We introduce a generic convex energy functional that is suitable for both grayscale and vector-valued images. Our functional is based on the eigenvalues of the structure tensor, therefore it penalizes image variation at every point by taking into account t ...

Springer2013

Analysis of linearization error for goal-oriented adaptivity of nonlinear problems

Luca Dede'

We propose in this talk to address the issue and effect of linearization in the quality of the error estimates in quantities of interest for strongly nonlinear problems. It is well known that the error representation in this case can be decomposed into two ...

International Center for Numerical Methods in Engineering (CIMNE)2013

Numerical Approximation Of Internal Discontinuity Interface Problems

Alfio Quarteroni, Marco Discacciati, Samuel Quinodoz

This work focuses on the finite element discretization of boundary value problems whose solution features either a discontinuity or a discontinuous conormal derivative across an interface inside the computational domain. The interface is characterized via ...

Siam Publications2013

Information-Theoretic Regret Bounds for Gaussian Process Optimization in the Bandit Setting

Andreas Krause, Matthias Seeger

Many applications require optimizing an unknown, noisy function that is expensive to evaluate. We formalize this task as a multiarmed bandit problem, where the payoff function is either sampled from a Gaussian process (GP) or has low norm in a reproducing ...

Institute of Electrical and Electronics Engineers2012

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Endomorphisme autoadjoint

Optimally Packed Chains of Bulges in Multishift QR Algorithms

Phase properties of operator valued measures in phase space

Operator-Like Wavelet Bases of L-2(R-d)

Operator-Like Wavelet Bases of $ L _{ 2 } $ $ (\mathbb{R} ^{ d } $ )

Odd linking and bifurcation in gaps: the weakly indefinite case

Convex Generalizations of Total Variation Based on the Structure Tensor with Applications to Inverse Problems

Analysis of linearization error for goal-oriented adaptivity of nonlinear problems

Numerical Approximation Of Internal Discontinuity Interface Problems

Distributed Pareto Optimization via Diffusion Strategies

Information-Theoretic Regret Bounds for Gaussian Process Optimization in the Bandit Setting

Graph Chatbot

Chattez avec Graph Search

Optimally Packed Chains of Bulges in Multishift QR Algorithms

Odd linking and bifurcation in gaps: the weakly indefinite case

Operator-Like Wavelet Bases of L-2(R-d)

Operator-Like Wavelet Bases of $ L _{ 2 } $ $ (\mathbb{R} ^{ d } $ )

Phase properties of operator valued measures in phase space

Convex Generalizations of Total Variation Based on the Structure Tensor with Applications to Inverse Problems

Analysis of linearization error for goal-oriented adaptivity of nonlinear problems

Numerical Approximation Of Internal Discontinuity Interface Problems

Distributed Pareto Optimization via Diffusion Strategies

Information-Theoretic Regret Bounds for Gaussian Process Optimization in the Bandit Setting