Results 21 to 30 of about 190,388 (322)

Congruences for the Apéry numbers modulo p³ [PDF]

open access: yesNotes on Number Theory and Discrete Mathematics
Let {Aₙ'} be the Apéry numbers given by Aₙ'=\Σⁿₖ₌ₒ$binom{n}{k}$²$binom{n+k}{k}$. For any prime p≡3 (mod 4) we show that A'_{(p-1)/2}≡p²/3$binom{(p-3)/2}{(p-3)/4}$² (mod p³). Let {tₙ} be given by t₀=1, t₁=5 and tₙ₊₁=(8n²+12n+5)tₙ-4n²(2n+1)²tₙ₋₁ (n≥1).
Zhi-Hong Sun
doaj   +1 more source

Petrographic structures and Hardy – Weinberg equilibrium

open access: yesЗаписки Горного института, 2020
The article is devoted to the most narrative side of modern petrography – the definition, classification and nomenclature of petrographic structures. We suggest a mathematical formalism using the theory of quadratic forms (with a promising extension to ...
Yury L. VOYTEKHOVSKY, Alena A. ZAKHAROVA
doaj   +1 more source

Rings and ideals parametrized by binary n-ic forms [PDF]

open access: yes, 2010
The association of algebraic objects to forms has had many important applications in number theory. Gauss, over two centuries ago, studied quadratic rings and ideals associated to binary quadratic forms, and found that ideal classes of quadratic rings ...
Wood, Melanie Matchett
core   +1 more source

Quantum-inspired optimization for wavelength assignment

open access: yesFrontiers in Physics, 2023
Problems related to wavelength assignment (WA) in optical communications networks involve allocating transmission wavelengths for known transmission paths between nodes that minimize a certain objective function, for example, the total number of ...
Aleksey S. Boev   +7 more
doaj   +1 more source

A QUBO Model for the Traveling Salesman Problem with Time Windows

open access: yesAlgorithms, 2019
This work focuses on expressing the TSP with Time Windows (TSPTW for short) as a quadratic unconstrained binary optimization (QUBO) problem. The time windows impose time constraints that a feasible solution must satisfy. These take the form of inequality
Christos Papalitsas   +4 more
doaj   +1 more source

Predictive‐based optimal automatic formation control of mobile vehicles

open access: yesIET Cyber-systems and Robotics, 2021
In recent years, formation control has received a great deal of attention as one of the most interesting issues in multiple mobile robots systems. In variable formation control systems, multiple mobile vehicles can form an appropriate formation from a ...
Tadanao Zanma   +3 more
doaj   +1 more source

Quaternions and binary quadratic forms [PDF]

open access: yesProceedings of the American Mathematical Society, 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 .
openaire   +2 more sources

Binary matrix factorization on special purpose hardware.

open access: yesPLoS ONE, 2021
Many fundamental problems in data mining can be reduced to one or more NP-hard combinatorial optimization problems. Recent advances in novel technologies such as quantum and quantum-inspired hardware promise a substantial speedup for solving these ...
Osman Asif Malik   +4 more
doaj   +1 more source

Quadratic involutions on binary forms

open access: yesMichigan Mathematical Journal, 2012
There is a classical geometric construction which uses a binary quadratic form to define an involution on the space of binary d-ics. We give a complete characterization of a general class of such involutions which are definable using compound transvectant formulae. We also study the associated varieties of forms which are preserved by such involutions.
Abdesselam, Abdelmalek   +1 more
openaire   +4 more sources

Hilbert polynomials of the algebras of $SL_ 2$-invariants

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2018
We consider one of the fundamental problems of classical invariant theory, the research of Hilbert polynomials for an algebra of invariants of Lie group $SL_2$.
N.B. Ilash
doaj   +1 more source

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