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Multivariate Haar systems in Besov function spaces
(2020-03)
We determine all cases for which the d-dimensional Haar wavelet system Hd on the unit cube Id is a conditional or unconditional Schauder basis in the classical isotropic Besov function spaces ......
Note on 1D quarklet approximation
(2020-03)
On the example of the simplest C0 spline quarklet construction of [1], we demonstrate the possible reduction of the complexity estimates for the approximation of singularity functions on the unit interval given ......
Understanding the evolution of Boraginales: insights from morphology, phylogeny, biogeography and taxonomy
(2024-08-14)
Boraginales are a medium-sized angiosperm order within Lamiids, with very diverse fruit morphology, which has been traditionally used for nomenclatural subdivisions. This thesis attempts to elucidate some aspects of the ......
Totalsynthesis of Pentamycin
(2024-08-14)
The polyene macrolide pentamycin, first isolated from Streptomyces penticus in 1958, displays impressive biological activities against various pathogens, including Trichomonas vaginalis or Candida albicans, and can be used ...
On the degree of ill-posedness of multi-dimensional magnetic particle imaging
(2017-12)
Magnetic particle imaging is an imaging modality of relatively recent origin, and it exploits the nonlinear magnetization response for reconstructing the concentration of nanoparticles. Since first invented in 2005, it has ...
Upscaled HDG methods for Brinkman equations with high-contrast heterogeneous coefficient
(2017-10)
In this paper, we present new upscaled HDG methods for Brinkman equations in the context of high-contrast heterogeneous media. The a priori error estimates are derived in terms of both fine and coarse scale parameters that ...
Stochastic subspace correction in Hilbert space
(2017-11)
We consider an incremental approximation method for solving variational problems in infinite-dimensional separable Hilbert spaces, where in each step a randomly and independently selected subproblem from an infinite ...
Tangent and normal cones for low-rank matrices
(2017-10)
In [D. R. Luke, J. Math. Imaging Vision, 47(3):231-238, 2013] the structure of the Mordukhovich normal cone to varieties of low rank matrices at rank-deficient points has been determined. A simplified proof of that result ......
Second order optimality conditions for optimal control of quasilinear parabolic equations
(2017-03)
We discuss an optimal control problem governed by a quasilinear parabolic PDE including mixed boundary conditions and Neumann boundary control, as well as distributed control. Second order necessary and sufficient optimality ......
Low-rank approximation to heterogeneous elliptic problems
(2017-03)
In this work, we investigate the low-rank approximation of elliptic problems in heterogeneous media by means of Kolmogrov n-width and asymptotic expansion. This class of problems arises in practical applications involving ......