Results 31 to 40 of about 190,388 (322)

On some extensions of Gauss’ work and applications

open access: yesOpen Mathematics, 2020
Let K be an imaginary quadratic field of discriminant dK{d}_{K} with ring of integers OK{{\mathcal{O}}}_{K}, and let τK{\tau }_{K} be an element of the complex upper half plane so that OK=[τK,1]{{\mathcal{O}}}_{K}={[}{\tau }_{K},1].
Jung Ho Yun, Koo Ja Kyung, Shin Dong Hwa
doaj   +1 more source

Secure Groups for Threshold Cryptography and Number-Theoretic Multiparty Computation

open access: yesCryptography, 2023
In this paper, we introduce secure groups as a cryptographic scheme representing finite groups together with a range of operations, including the group operation, inversion, random sampling, and encoding/decoding maps.
Berry Schoenmakers, Toon Segers
doaj   +1 more source

Primitive lattice points inside an ellipse [PDF]

open access: yes, 2003
Let Q(u,v) be a positive definite binary quadratic form with arbitrary real coefficients. For large real x, one may ask for the number B(x) of primitive lattice points (integer points (m,n) with gcd(m,n) = 1) in the ellipse disc Q(u,v) < x, in particular,
Nowak, Werner Georg
core   +1 more source

Period Change of W UMa Type Contact Binary AB And [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1997
The CCD photometric observations of W UMa-type eclipsing binary AB And were made from September 1994 to October 1996. New four primary minimum times were obtained form these observations.
Ho Jin   +4 more
doaj  

Using Machine Learning for Quantum Annealing Accuracy Prediction

open access: yesAlgorithms, 2021
Quantum annealers, such as the device built by D-Wave Systems, Inc., offer a way to compute solutions of NP-hard problems that can be expressed in Ising or quadratic unconstrained binary optimization (QUBO) form.
Aaron Barbosa   +3 more
doaj   +1 more source

On prime values of binary quadratic forms with a thin variable

open access: yes, 2018
In this paper we generalize the result of Fouvry and Iwaniec dealing with prime values of the quadratic form $x^2 + y^2$ with one input restricted to a thin subset of the integers.
Lam, Peter Cho-Ho   +2 more
core   +1 more source

H∞ Fault Detection for Linear Discrete Time-Varying Descriptor Systems with Missing Measurements

open access: yesDiscrete Dynamics in Nature and Society, 2015
This paper deals with the problem of H∞ fault detection for a class of linear discrete time-varying descriptor systems with missing measurements, and the missing measurements are described by a Bernoulli random binary switching sequence.
Guangfu Deng, Huihong Zhao
doaj   +1 more source

The Complexity of Rooted Phylogeny Problems [PDF]

open access: yesLogical Methods in Computer Science, 2011
Several computational problems in phylogenetic reconstruction can be formulated as restrictions of the following general problem: given a formula in conjunctive normal form where the literals are rooted triples, is there a rooted binary tree that ...
Manuel Bodirsky, Jens K Mueller
doaj   +1 more source

Better Autologistic Regression

open access: yesFrontiers in Applied Mathematics and Statistics, 2017
Autologistic regression is an important probability model for dichotomous random variables observed along with covariate information. It has been used in various fields for analyzing binary data possessing spatial or network structure.
Mark A. Wolters
doaj   +1 more source

Exploration of new chemical materials using black-box optimization with the D-wave quantum annealer

open access: yesFrontiers in Computer Science, 2023
In materials informatics, searching for chemical materials with desired properties is challenging due to the vastness of the chemical space. Moreover, the high cost of evaluating properties necessitates a search with a few clues.
Mikiya Doi   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy