Results 31 to 40 of about 9,542 (190)

Quantum singularities in spherically symmetric, conformally static spacetimes [PDF]

open access: yes, 2013
A definition of quantum singularity for the case of static spacetimes has recently been extended to conformally static spacetimes. Here the theory behind quantum singularities in conformally static spacetimes is reviewed, and then applied to a class of ...
Helliwell, T. M., Konkowski, D. A.
core   +1 more source

QUANTUM ASPECTS OF 2+1 GRAVITY [PDF]

open access: yes, 1995
We review and systematize recent attempts to canonically quantize general relativity in 2+1 dimensions, defined on space-times $\R\times\Sigma^g$, where $\Sigma^g$ is a compact Riemann surface of genus $g$.
Okai T., R. Loll
core   +3 more sources

Hosoya Index of L-Type Polyphenyl Spiders

open access: yesJournal of Chemistry, 2016
The polyphenyl system is composed of n hexagons obtained from two adjacent hexagons that are sticked by a path with two vertices. The Hosoya index of a graph G is defined as the total number of the independent edge sets of G.
Ren Shengzhang, Wu Tingzeng
doaj   +1 more source

Hosoya and Harary Polynomials of Hourglass and Rhombic Benzenoid Systems

open access: yesJournal of Chemistry, 2020
In the fields of chemical graph theory, topological index is a type of a molecular descriptor that is calculated based on the graph of a chemical compound.
Zhong-Lin Cheng   +4 more
doaj   +1 more source

The expected values of the total numbers of independent edge sets and independent sets in random alpha-type pentagonal chains

open access: yesHeliyon, 2023
A independent edge set of G containing mutually independent edges is also called a matching of G. The total numbers of matchings and independent sets of a graph G, namely, the Hosoya index and the Merrifield-Simmons index, respectively, are two important
Lina Wei, Hong Bian, Haizheng Yu
doaj   +1 more source

Estimating persistence in the volatility of asset returns with signal plus noise models [PDF]

open access: yes, 2010
This paper examines the degree of persistence in the volatility of financial time series using a Long Memory Stochastic Volatility (LMSV) model. Specifically, it employs a Gaussian semiparametric (or local Whittle) estimator of the memory parameter ...
Caporale, GM, Gil-Alana, LA
core   +2 more sources

Graphs with maximal Hosoya index and minimal Merrifield–Simmons index

open access: yesDiscrete Mathematics, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhu, Zhongxun   +3 more
openaire   +1 more source

Hosoya Polynomials of Steiner Distance of Complete m-partite Graphs and Straight Hexagonal Chains(*) [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2008
The Hosoya polynomials of Steiner distance of complete m-partite graphs  and Straight hexagonal chains  are obtained in this paper. The Steiner n-diameter and Wiener index of Steiner n-distance of   and   are also obtained.
Ali Ali, Herish Abdullah
doaj   +1 more source

Hosoya Polynomial, Wiener Index, Coloring and Planar of Annihilator Graph of Zn [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2020
Let R be a commutative ring with identity. We consider ΓB(R) an annihilator graph of the commutative ring R. In this paper, we find Hosoya polynomial, Wiener index, Coloring, and Planar annihilator graph of Zn denote ΓB(Zn) , with n= pm or n=pmq, where p,
Mohammed Ahmed   +2 more
doaj   +1 more source

de Broglie-Bohm Interpretation for the Wave Function of Quantum Black Holes [PDF]

open access: yes, 1997
We study the quantum theory of the spherically symmetric black holes. The theory yields the wave function inside the apparent horizon, where the role of time and space coordinates is interchanged. The de Broglie-Bohm interpretation is applied to the wave
A. Hosoya   +30 more
core   +2 more sources

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