Results 21 to 30 of about 26,406 (246)

Hermitian Laplacian Matrix of Directed Graphs [PDF]

open access: yesJisuanji kexue, 2023
Laplacian matrix plays an important role in the research of undirected graphs.From its spectrum,some structure and properties of a graph can be deduced.Based on this,several efficient algorithms have been designed for relevant tasks in graphs,such as ...
LIU Kaiwen, HUANG Zengfeng
doaj   +1 more source

Laplacian Pattern Formation [PDF]

open access: yesEurophysics News, 1988
The formation of snowflakes, viscous fingers and electrodeposits is governed by analogous equations : these structures are all Laplacian patterns. In this paper we review model experiments and computer simulations which are widely used to study diverse morphologies resulting from the motion of unstable interfaces.
Vicsek, Tamás, Kertész, János
openaire   +2 more sources

An eigenvalue optimization problem for Dirichlet-Laplacian with a drift [PDF]

open access: yesمدل‌سازی پیشرفته ریاضی
In this paper, we prove a monotonicity result related to the principal eigenvalue for Dirichlet-Laplacian with a drift operator in a punctured ball.
محسن زیوری رضاپور
doaj   +1 more source

Fractional Laplacian pyramids [PDF]

open access: yes2009 16th IEEE International Conference on Image Processing (ICIP), 2009
We provide an extension of the L 2 -spline pyramid (Unser et al., 1993) using polyharmonic splines. We analytically prove that the corresponding error pyramid behaves exactly as a multi-scale Laplace operator. We use the multiresolution properties of polyharmonic splines to derive an efficient, non-separable filterbank implementation.
Delgado-Gonzalo, Ricard   +2 more
openaire   +2 more sources

A class of digraphs which have completely real Laplacian spectra(一类具有全实Laplacian谱的有向图)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2011
分别研究了一类带有Hamiltonian路和带有Hamiltonian圈的有向图的基本有圈性(essential cyclicity),给出了这种有向图的Laplacian谱,表明这些图具有全实的Laplacian谱.
SULi(苏莉), LIHong-hai(李红海)
doaj   +1 more source

PERSISTENT DIRECTED FLAG LAPLACIAN. [PDF]

open access: yesFound Data Sci
Topological data analysis (TDA) has had enormous success in science and engineering in the past decade. Persistent topological Laplacians (PTLs) overcome some limitations of persistent homology, a key technique in TDA, and provide substantial insight to the behavior of various geometric and topological objects.
Jones B, Wei GW.
europepmc   +5 more sources

Discrete Magnetic Laplacian [PDF]

open access: yesCommunications in Mathematical Physics, 1994
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Validating the Comparison Framework for the Finite Dimensions Model of Concentric Ring Electrodes Using Human Electrocardiogram Data

open access: yesApplied Sciences, 2019
While progress has been made in design optimization of concentric ring electrodes maximizing the accuracy of the surface Laplacian estimation, it was based exclusively on the negligible dimensions model of the electrode.
Oleksandr Makeyev   +5 more
doaj   +1 more source

On Fractional Laplacians

open access: yesCommunications in Partial Differential Equations, 2014
14 pages; this version is considerably ...
MUSINA, Roberta, Nazarov A. I.
openaire   +3 more sources

On the Laplacian, signless Laplacian and normalized Laplacian characteristic polynomials of a graph [PDF]

open access: yesCzechoslovak Mathematical Journal, 2013
The authors prove a number of formulas on the characteristic polynomials of the Laplacian, signless Laplacian and normalized Laplacian matrices of graphs. The use of these formulas is exemplified in constructions of graphs cospectral with respect to the appropriate matrix.
Guo, Ji-Ming, Li, Jianxi, Shiu, Wai Chee
openaire   +1 more source

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