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A Generalized Discrete Morse–Floer Theory [PDF]

open access: hybridCommunications in Mathematics and Statistics, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jürgen Jost, Sylvia Yaptieu
openalex   +3 more sources

Discrete Morse theory on $ΩS^2$ [PDF]

open access: greenTopology and its Applications
A classical result in Morse theory is the determination of the homotopy type of the loop space of a manifold. In this paper, we study this result through the lens of discrete Morse theory. This requires a suitable simplicial model for the loop space. Here, we use Milnor's $\textrm{F}^+\textrm{K}$ construction to model the loop space of the sphere $S^2$,
Lacey Johnson, K. Knudson
  +5 more sources

A practical guide to characterising ecological coexistence. [PDF]

open access: yesBiol Rev Camb Philos Soc
ABSTRACT Coexistence is simultaneously one of the most fundamental concepts of ecology, and one of the most difficult to define. A particular challenge is that, despite a well‐developed body of research, several different schools of thought have developed over the past century, leading to multiple independent, and largely isolated, branches of ...
Clark AT   +9 more
europepmc   +2 more sources

Line Structure Extraction from LiDAR Point Cloud Based on the Persistence of Tensor Feature

open access: yesApplied Sciences, 2022
The LiDAR point cloud has been widely used in scenarios of automatic driving, object recognition, structure reconstruction, etc., while it remains a challenging problem in line structure extraction, due to the noise and accuracy, especially in data ...
Xuan Wang   +3 more
doaj   +1 more source

Discrete Stratified Morse Theory

open access: yesDiscrete & Computational Geometry, 2022
Inspired by the works of Forman on discrete Morse theory, which is a combinatorial adaptation to cell complexes of classical Morse theory on manifolds, we introduce a discrete analogue of the stratified Morse theory of Goresky and MacPherson. We describe the basics of this theory and prove fundamental theorems relating the topology of a general ...
Kevin Knudson, Bei Wang
openaire   +3 more sources

Combinatorial Topology of Toric arrangements [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2013
We prove that the complement of a complexified toric arrangement has the homotopy type of a minimal CW-complex, and thus its homology is torsion-free.
Giacomo d'Antonio, Emanuele Delucchi
doaj   +1 more source

Topology-based individual tree segmentation for automated processing of terrestrial laser scanning point clouds

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2023
Terrestrial laser scanning (TLS) is a ground-based approach to rapidly acquire 3D point clouds via Light Detection and Ranging (LiDAR) technologies. Quantifying tree-scale structure from TLS point clouds requires segmentation, yet there is a lack of ...
Xin Xu   +4 more
doaj   +1 more source

Boundary Value Problem for a Second-Order Difference Equation with Resonance

open access: yesComplexity, 2020
In this paper, we study the existence and multiplicity of nontrivial solutions of a second-order discrete boundary value problem with resonance and sublinear or superlinear nonlinearity.
Zhenguo Wang, Zhan Zhou
doaj   +1 more source

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