Results 11 to 20 of about 548,121 (295)
The $L^{\infty }$-positivity Preserving Property and Stochastic Completeness [PDF]
Potential Analysis, 2022 We say that a Riemannian manifold satisfies the $L^p$-positivity preserving property if $(-Δ+ 1)u\ge 0$ in a distributional sense implies $u \ge 0$ for all $ u \in L^p$.While geodesic completeness of the manifold at hand ensures the $L^p$-positivity preserving property for all $p \in (1, +\infty)$, when $p = + \infty$ some assumptions are needed.
Bisterzo, A, Marini, L
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Discrete Dynamics in Nature and Society, 2021 In this study, we present an unconditionally stable positivity-preserving numerical method for the Fisher–Kolmogorov–Petrovsky–Piskunov (Fisher–KPP) equation in the one-dimensional space. The Fisher–KPP equation is a reaction-diffusion system that can be
Sangkwon Kim +8 more
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Symmetric Positivity Preserving Balanced Truncation [PDF]
PAMM, 2012 AbstractWe consider positivity preserving model order reduction of SISO linear systems. Whereas well‐established model reduction methods usually do not result in a positive approximation, we show that a symmetry characterization of balanced truncation can be used to preserve positivity after performing balanced truncation.
Christian Grußler, Tobias Damm
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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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Preserving positivity for rank-constrained matrices [PDF]
, 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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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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Frontiers in Physics, 2021 From the observed datasets, we should be able to produce curve surfaces that have the same characteristics as the original datasets. For instance, if the given data are positive, then the resulting curve or surface must be positive on entire given ...
Samsul Ariffin Abdul Karim +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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Mass-Preserving Approximation of a Chemotaxis Multi-Domain Transmission Model for Microfluidic Chips
Mathematics, 2021 The present work is inspired by the recent developments in laboratory experiments made on chips, where the culturing of multiple cell species was possible.
Elishan Christian Braun +2 more
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Monotonicity-preserving splitting schemes for solving balance laws [PDF]
Iranian Journal of Numerical Analysis and Optimization, 2021 In this paper, some monotonicity-preserving (MP) and positivity-preserving (PP) splitting methods for solving the balance laws of the reaction and diffusion source terms are investigated.
F. Khodadosti, J. Farzi, M.M. Khalsaraei
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