Results 41 to 50 of about 1,818 (187)
Estimating persistence in the volatility of asset returns with signal plus noise models [PDF]
, 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
Entropy, 2015 This paper demonstrates properties of Hosoya entropy, a quantitative measure of graph complexity based on a decomposition of the vertices linked to partial Hosoya polynomials.
Abbe Mowshowitz, Matthias Dehmer
doaj +1 more source
Hosoya Polynomial and Wiener Index of Zero-Divisor Graph of Z_n [PDF]
Al-Rafidain Journal of Computer Sciences and Mathematics, 2018 Let R be a commutative ring with identity. We associate a graph . In this paper, we find Hosoya polynomial and Wiener index of Zn , with n= pm or n= pmq, where p and q are distinct prime numbers and m is an integer with m 2.
Husam Mohammad, Mohammad Authman
doaj +1 more source
Novel high-efficiency 2D position-sensitive ZnS:Ag/6LiF scintillator detector for neutron diffraction [PDF]
J Appl CrystallogrA novel high‐efficiency 2D position‐sensitive wavelength‐shifting‐fibre ZnS:Ag/6LiF scintillator detector has been developed at ISIS for single‐crystal diffraction applications. More than a factor of 3 improvement in efficiency was achieved with this detector compared with clear‐fibre scintillator detectors, and software routines for further ...
Mauri G +8 more
europepmc +2 more sources
Hamiltonian structure of 2+1 dimensional gravity [PDF]
, 2000 A summary is given of some results and perspectives of the hamiltonian ADM approach to 2+1 dimensional gravity. After recalling the classical results for closed universes in absence of matter we go over the the case in which matter is present in the form
A Ashtekar +33 more
core +3 more sources
The edge-Hosoya polynomial of benzenoid chains [PDF]
Journal of Mathematical Chemistry, 2018 The Hosoya polynomial is a well known vertex-distance based polynomial, closely correlated to the Wiener index and the hyper-Wiener index, which are widely used molecular-structure descriptors. In the present paper we consider the edge version of the Hosoya polynomial.
Niko Tratnik, Petra Žigert Pleteršek
openaire +2 more sources
Quantum singularities in spherically symmetric, conformally static spacetimes [PDF]
, 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
Time Optimal Unitary Operations [PDF]
, 2006 Extending our previous work on time optimal quantum state evolution, we formulate a variational principle for the time optimal unitary operation, which has direct relevance to quantum computation. We demonstrate our method with three examples, i.e.
A. Messiah +8 more
core +2 more sources
Hosoya and Wiener Index of Zero-Divisor Graph of Z pm q2
Zanco Journal of Pure and Applied Sciences, 2019 In this work, we study zero-divisor graph of the ring Zpmq2 and give some properties of this graph. Furthermore we find Hosoya polynomial and Wiener index for this graph.
Nazar H. Shuker +2 more
doaj +1 more source
M-polynomials and topological indices of linear chains of benzene, napthalene and anthracene
Mathematical Biosciences and Engineering, 2020 The universality of M-polynomial paves way towards establishing closed forms of many leading degree-based topological indices as it is done by Hosoya polynomial for distance-based indices.
Cheng-Peng Li +4 more
doaj +1 more source