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pro vyhledávání: '"Reif, Ulrich"'
Autor:
Mejstrik, Thomas, Reif, Ulrich
In this paper we propose a modification to the invariant polytope algorithm (ipa) using ideas of the finite expressible tree algorithm (feta) by M\"oller and Reif. We show that our new feta-flavoured-ipa applies to a wider range of matrix families.
Externí odkaz:
http://arxiv.org/abs/2308.05244
Autor:
Reif, Ulrich
We investigate Sobolev regularity of bivariate functions obtained in Isogeometric Analysis when using geometry maps that are degenerate in the sense that the first partial derivatives vanish at isolated points. In particular, we show how the known C1
Externí odkaz:
http://arxiv.org/abs/2306.13494
Autor:
Marussig, Benjamin, Reif, Ulrich
Publikováno v:
Computer Aided Geometric Design, Volume 97, August 2022, 102134
We analyze surface patches with a corner that is rounded in the sense that the partial derivatives at that point are antiparallel. Sufficient conditions for $G^1$ smoothness are given, which, up to a certain degenerate case, are also necessary. Furth
Externí odkaz:
http://arxiv.org/abs/2203.12345
Estimation of a regression function from independent and identically distributed data is considered. The $L_2$ error with integration with respect to the distribution of the predictor variable is used as the error criterion. The rate of convergence o
Externí odkaz:
http://arxiv.org/abs/2107.09532
Autor:
REIF, ULRICH1 reif@mathematik.tu-darmstadt.de
Publikováno v:
Journal of Inequalities & Special Functions. 2024, Vol. 15 Issue 2, p1-6. 6p.
Autor:
Martin, Florian, Reif, Ulrich
We introduce trimmed NURBS surfaces with accurate boundary control, briefly called ABC-surfaces, as a solution to the notorious problem of constructing watertight or smooth ($G^1$ and $G^2)$ multi-patch surfaces within the function range of standard
Externí odkaz:
http://arxiv.org/abs/2009.02480
Autor:
Reif, Ulrich, Weinmann, Andreas
We consider geometric Hermite subdivision for planar curves, i.e., iteratively refining an input polygon with additional tangent or normal vector information sitting in the vertices. The building block for the (nonlinear) subdivision schemes we propo
Externí odkaz:
http://arxiv.org/abs/2004.07495
Publikováno v:
In Journal of Approximation Theory May 2023 289
Akademický článek
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Publikováno v:
In Journal of Statistical Planning and Inference January 2023 222:160-181