Results 11 to 20 of about 377,631 (158)
Positivity preserving high order schemes for angiogenesis models
, 2022 Hypoxy induced angiogenesis processes can be described by coupling an integrodifferential kinetic equation of Fokker–Planck type with a diffusion equation for the angiogenic factor.
Cebrián, Elena +1 more
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Experiments with a Positivity-Preserving Operator [PDF]
Experimental Mathematics, 2008 We consider some multivariate rational functions which have (or are conjectured to have) only positive coefficients in their series expansion. We consider an operator that preserves positivity of series coefficients, and apply the inverse of this operator to the rational functions.
Manuel Kauers, Doron Zeilberger
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A positivity-preserving scheme for fluctuating hydrodynamics
Journal of Computational Physics, 2022 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Francesco Magaletti +4 more
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Positivity-preserving methods for population models
CoRR, 2021 Many important applications are modelled by differential equations with positive solutions. However, it remains an outstanding open problem to develop numerical methods that are both (i) of a high order of accuracy and (ii) capable of preserving positivity.
Sergio Blanes +2 more
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Positivity preserving finite element approximation [PDF]
Mathematics of Computation, 2001 We consider finite element operators defined on “rough” functions in a bounded polyhedron Ω \Omega
Ricardo H. Nochetto, Lars B. Wahlbin
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Positivity-preserving methods for ordinary differential equations [PDF]
, 2022 Many important applications are modelled by differential equations with positive solutions. However, it remains an outstanding open problem to develop numerical methods that are both (i) of a high order of accuracy and (ii) capable of preserving ...
Iserles, A +8 more
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Salient Object Ranking with Position-Preserved Attention [PDF]
2021 IEEE/CVF International Conference on Computer Vision (ICCV), 2021 Instance segmentation can detect where the objects are in an image, but hard to understand the relationship between them. We pay attention to a typical relationship, relative saliency. A closely related task, salient object detection, predicts a binary map highlighting a visually salient region while hard to distinguish multiple objects.
Hao Fang +7 more
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Bounded real lemmas for positive descriptor systems [PDF]
, 2015 A well known result in the theory of linear positive systems is the existence of positive definite diagonal matrix (PDDM) solutions to some well known linear matrix inequalities (LMIs).
Yan, Xinggang +3 more
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Representation and Approximation of Positivity Preservers [PDF]
Journal of Geometric Analysis, 2010 17 ...
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Preserving positivity for rank-constrained matrices
, 2017 Entrywise functions preserving the cone of positive semidefinite matrices have been studied by many authors, most notably by Schoenberg [Duke Math. J. 9] and Rudin [Duke Math. J. 26].
Khare, Apoorva +2 more
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