Results 1 to 10 of about 273,375 (330)

Topological gravity for arbitrary Dyson index [PDF]

Journal of High Energy Physics
We use the well established duality of topological gravity to a double scaled matrix model with the Airy spectral curve to define what we refer to as topological gravity with arbitrary Dyson index β (β topological gravity).
Torsten Weber, Marco Lents, Johannes Dieplinger, Juan Diego Urbina, Klaus Richter   +4 more
doaj   +4 more sources

Index theorem on chiral Landau bands for topological fermions [PDF]

, 2021
Topological fermions as excitations from multi-degenerate Fermi points have been attracting increasing interests in condensed matter physics. They are characterized by topological charges, and magnetic fields are usually applied in experiments for their ...
Yang, Shengyuan A., Zhao, Y. X.
core   +2 more sources

Classification of quantum-spin-hall topological phase in 2D photonic continuous media using electromagnetic parameters [PDF]

Nanophotonics
Refractive index is a fundamental electromagnetic (EM) parameter that can describe photonic continuous media (PCM) traditionally as either transparency or opacity.
He Xin-Tao, Zhang Shuo-Shi, Chen Xiao-Dong, Dong Jian-Wen   +3 more
doaj   +2 more sources

Spectral norm and energy of a digraph with respect to a VDB topological index. [PDF]

Heliyon
Espinal C, Monsalve J, Rada J.
europepmc   +3 more sources

ISI(G) Topological Index of Sum Graphs For Some Finite Groups

Academic Science Journal, 2023
A topological index can capture much information about a mathematical structure into an actual number. The topological indices have an essential role in theoretical mathematics.
mahera rabee
doaj   +1 more source

On Certain Aspects of Topological Indices

Journal of Mathematics, 2021
A topological index, also known as connectivity index, is a molecular structure descriptor calculated from a molecular graph of a chemical compound which characterizes its topology.
Tanweer Ul Islam, Zeeshan Saleem Mufti, Aqsa Ameen, Muhammad Nauman Aslam, Ali Tabraiz   +4 more
doaj   +1 more source

Novel Degree-Based Topological Descriptors of Fenofibrate Using M-Polynomial

Journal of Mathematics, 2023
Chemical graph theory is currently expanding the use of topological indices to numerically encode chemical structure. The prediction of the characteristics provided by the chemical structure of the molecule is a key feature of these topological indices ...
Muhammad Kamran, Muhammad Farman, Seyma Ozon Yildirim, Sadik Delen, Ismail Naci Cangul, Maria Akram, M. K. Pandit   +6 more
doaj   +1 more source

Study of Neighborhood Degree-Based Topological Indices via Direct and NM-Polynomial of Starphene Graph

Journal of Function Spaces, 2022
Our objective is to compute the neighborhood degree-based topological indices via NM-polynomial for starphene. In the neighborhood degree-based topological indices, we compute the third version of the Zagreb index; neighborhood second Zagreb index ...
Deeba Afzal, Saira Hameed, Usman Ashraf, Arif Mehmood, Faryal Chaudhry, Dhan Kumari Thapa   +5 more
doaj   +1 more source

Computation of Revan Topological Indices for Phenol-Formaldehyde Resin

Journal of Mathematics, 2022
Phenol-formaldehyde resin has a wide range of moldings. The phenolic resin retains properties at the freezing point; hence, it is difficult to determine its age.
Muhammad Kamran, Nadeem Salamat, Riaz Hussain Khan, Muhammad Abaid Ullah, Muhammad Shazib Hameed, M. K. Pandit   +5 more
doaj   +1 more source

Quantifying some distance topological properties of the non-zero component graph

AIMS Mathematics, 2021
Several bioactivities of chemical compounds in a molecular graph can be expected by using many topological descriptors. A topological descriptor is a numeric quantity which quantify the topology of a graph.
Fawaz E. Alsaadi, Faisal Ali, Imran Khalid , Masood Ur Rehman, Muhammad Salman, Madini Obad Alassafi, Jinde Cao   +6 more
doaj   +1 more source