Results 21 to 30 of about 548,121 (295)
Shape-Preserving Properties of a Relaxed Four-Point Interpolating Subdivision Scheme
Mathematics, 2020 In this paper, we analyze shape-preserving behavior of a relaxed four-point binary interpolating subdivision scheme. These shape-preserving properties include positivity-preserving, monotonicity-preserving and convexity-preserving.
Pakeeza Ashraf +5 more
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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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Shape-Preservation of the Four-Point Ternary Interpolating Non-stationary Subdivision Scheme
Frontiers in Physics, 2020 In this paper, we present the shape-preserving properties of the four-point ternary non-stationary interpolating subdivision scheme (the four-point scheme). This scheme involves a tension parameter.
Pakeeza Ashraf +4 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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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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Frontiers in Physics, 2022 High order entropy stable schemes provide improved robustness for computational simulations of fluid flows. However, additional stabilization and positivity preserving limiting can still be required for variable-density flows with under-resolved features.
Jesse Chan +5 more
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Representation and Approximation of Positivity Preservers [PDF]
Journal of Geometric Analysis, 2010 17 ...
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Positivity preserving transformations for 𝑞-binomial coefficients [PDF]
Transactions of the American Mathematical Society, 2004 Several new transformations for q q -binomial coefficients are found, which have the special feature that the kernel is a ...
Berkovich, A., Warnaar, S. O.
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Necessary conditions for reaction-diffusion system with delay preserving positivity
Electronic Journal of Qualitative Theory of Differential Equations, 2016 We consider the reaction--diffusion system with delay \begin{equation*} \left\{\begin{aligned} &\frac{\partial u}{\partial t}=A(t,x)\Delta u-\sum_{i=1}^{k}\gamma_{i}(t,x)\partial_{x_{i}}u +f(t,u_{t}) , &x\in \Omega; \\ &B(u)|_{\partial \Omega}=0.\\ \
Lirui Feng +3 more
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Matrix positivity preservers in fixed dimension. I [PDF]
Advances in Mathematics, 2016 A classical theorem of I.J. Schoenberg characterizes functions that preserve positivity when applied entrywise to positive semidefinite matrices of arbitrary size. Obtaining similar characterizations in fixed dimension is intricate. In this note, we provide a solution to this problem in the polynomial case.
Alexander Belton +3 more
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