Topological data analysis (TDA) has made significant progress in developing a new class of fundamental operators known as the Dirac operator, particularly in topological signals and molecular representations. However, the current approaches being used are based on the classical case of chain complexes. The present study establishes Mayer Dirac operators based on -chain complexes. These operators interconnect an alternating sequence of Mayer Laplacian operators, providing a generalization of the classical result . Furthermore, the research presents an explicit formulation of the Laplacian for -chain complexes induced by vertex sequences on a finite set. Weighted versions of Mayer Laplacian and Dirac operators are introduced to expand the scope and improve applicability, showcasing their effectiveness in capturing physical attributes in various practical scenarios. The study presents a generalized version for factorizing Laplacian operators as an operator's product and its 'adjoint'. Additionally, the proposed persistent Mayer Dirac operators and extensions are applied to biological and chemical domains, particularly in the analysis of molecular structures. The study also highlights the potential applications of persistent Mayer Dirac operators in data science.
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http://dx.doi.org/10.1088/2632-072X/ad83a5 | DOI Listing |
J Phys Complex
December 2024
Department of Mathematics, Michigan State University, East Lansing, MI 48824, United States of America.
Sci Adv
September 2024
Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, USA.
Proc Biol Sci
July 2024
Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, People's Republic of China.
Caddisflies (Trichoptera) are among the most diverse groups of freshwater animals with more than 16 000 described species. They play a fundamental role in freshwater ecology and environmental engineering in streams, rivers and lakes. Because of this, they are frequently used as indicator organisms in biomonitoring programmes.
View Article and Find Full Text PDFAdv Sci (Weinh)
May 2024
Institute for Topological Insulators, Am Hubland, 97074, Würzburg, Germany.
Sci Rep
April 2021
Department of Physics, University of Ottawa, Ottawa, Canada.
We explore the substrate-dependent charge carrier dynamics of large area graphene films using contact-free non-invasive terahertz spectroscopy. The graphene samples are deposited on seven distinct substrates relevant to semiconductor technologies and flexible/photodetection devices. Using a Drude model for Dirac fermions in graphene and a fitting method based on statistical signal analysis, we extract transport properties such as the charge carrier density and carrier mobility.
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