Results 11 to 20 of about 13,394,361 (202)

Binary positive semidefinite matrices and associated integer polytopes [PDF]

open access: yes, 2012
We consider the positive semidefinite (psd) matrices with binary entries, along with the corresponding integer polytopes.We begin by establishing some basic properties of these matrices and polytopes.
Sorensen, M M, Letchford, A N
core   +4 more sources

Binary quadratic forms: modern developments [PDF]

open access: yes
In this work, we offer a historical stroll through the vast topic of binary quadratic forms. We begin with a quick review of their history and then an overview of contemporary algebraic developments on the subject.Dedicated to Athanase Papadopoulos for ...
Zeytin, Ayberk
core   +9 more sources

Invariants of binary forms [PDF]

open access: yes, 2014
We work over the field of complex numbers. Consider the set V_n of binary forms of degree n, i.e., homogeneous polynomials of degree n in two variables. An invariant of V_n is a polynomial in the coefficients of a form in V_n whose value does not change ...
Popoviciu Draisma, Mihaela Ileana
core   +1 more source

Cubic residues and binary quadratic forms [PDF]

open access: yes, 2007
Let p>3 be a prime, u,v,d∈Z, gcd(u,v)=1, p∤u2−dv2 and (−3dp)=1, where (ap) is the Legendre symbol. In the paper we mainly determine the value of (u−vdu+vd)(p−(p3))/3(mod p) by expressing p in terms of appropriate binary quadratic forms.
Sun, Zhi-Hong
core   +1 more source

Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane   +3 more
wiley   +1 more source

Binary quadratic forms and genus theory [PDF]

open access: yes, 2013
The study of binary quadratic forms arose as a natural generalization of questions about the integers posed by the ancient Greeks. A major milestone of understanding occurred with the publication of Gauss's Disquisitiones Arithmeticae in 1801 in which ...
NC DOCKS at The University of North Carolina at Greensboro   +1 more
core  

dynoGP: Deep Gaussian Processes for Dynamic System Identification

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces a novel class of deep models for system identification, dynamical deep Gaussian processes, which combine the strengths of data‐driven methods, such as those based on neural network architectures, with the ability to output a probability distribution for uncertainty representation.
Alessio Benavoli   +3 more
wiley   +1 more source

An algebraic approach to the Siegel-Weil average for binary quadratic forms [PDF]

open access: yes, 2019
In this talk, we will consider the celebrated results of Siegel and Weil about the number of representations by the genus of a given positivedefinite integral quadratic form.
Kane, BR
core  

Quaternions and binary quadratic forms

open access: yes, 1971
Methods are discussed for studying binary quadratic forms by use of quaternions derived from the ternary quadratic form f = x 2 − y z f = {x^2} - yz .
Bart Rice
core   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez   +5 more
wiley   +1 more source

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