Results 21 to 30 of about 103,878 (304)

On the spectral problem of the quantum KdV hierarchy [PDF]

open access: yes, 2021
The spectral problem for the quantum dispersionless Korteweg–de Vries (KdV) hierarchy, aka the quantum Hopf hierarchy, is solved by Dubrovin. In this article, following Dubrovin, we study Buryak–Rossi's quantum KdV hierarchy.
Ruzza, Giulio, Di Yang
core   +1 more source

Quantum mechanical calculation of electron spin

open access: yesOpen Physics, 2017
The classical and quantum mechanical methods are used respectively to calculate the electron spin. It is shown that the classical method cannot derive the correct magnetic moment value.
Zhao Hai-Long
doaj   +1 more source

Gravity, scale invariance and the hierarchy problem

open access: yesJournal of High Energy Physics, 2018
Combining the quantum scale invariance with the absence of new degrees of freedom above the electroweak scale leads to stability of the latter against perturbative quantum corrections.
Mikhail Shaposhnikov, Andrey Shkerin
doaj   +1 more source

Model-Checking Problems as a Basis for Parameterized Intractability [PDF]

open access: yesLogical Methods in Computer Science, 2005
Most parameterized complexity classes are defined in terms of a parameterized version of the Boolean satisfiability problem (the so-called weighted satisfiability problem). For example, Downey and Fellow's W-hierarchy is of this form.
Joerg Flum, Martin Grohe
doaj   +1 more source

The real gauge hierarchy problem

open access: yesPhysics Letters B, 1981
Abstract We discuss the problem of generating two vastly different mass scales through spontaneous symmetry breaking. We find that to all orders in perturbation theory this can only be achieved if there is a non-trivial relation between the couplings of the theory.
Smith, C, Ross, G
openaire   +2 more sources

Solution of the Least Squares Method problem of pairwise comparison matrices [PDF]

open access: yes, 2008
The aim of the paper is to present a new global optimization method for determining all the optima of the Least Squares Method (LSM) problem of pairwise comparison matrices. Such matrices are used, e.g., in the Analytic Hierarchy Process (AHP).
Bozóki, Sándor
core   +1 more source

Motions of Curves in the Projective Plane Inducing the Kaup-Kupershmidt Hierarchy [PDF]

open access: yes, 2012
The equation of a motion of curves in the projective plane is deduced. Local flows are defined in terms of polynomial differential functions. A family of local flows inducing the Kaup-Kupershmidt hierarchy is constructed.
Musso, Emilio, Emilio Musso, Musso, E.
core   +1 more source

A Conservation Law Treatment of Nonlinear KdV Hierarchies

open access: yesJournal of Mathematics, 2022
We study the hierarchy commonly defined as an infinite sequence of partial differential equations which begins with the Korteweg–de Vries equation and its modified version. An important feature of the hierarchy is its highly nonlinear property.
Sameerah Jamal, Rivoningo Maphanga
doaj   +1 more source

Optimization problems and the polynomial hierarchy

open access: yesTheoretical Computer Science, 1981
AbstractIt is demonstrated that such problems as the symmetric Travelling Salesman Problem, Chromatic Number Problem, Maximal Clique Problem and a Knapsack Packing Problem are in the ΔP2 level of PH and no lower if ∑P1 ≠ ΠP1, or NP≠co-NP. This shows that these problems cannot be solved by polynomial reductions that use only positive information from an
E. W. Leggett Jr., Daniel J. Moore
openaire   +1 more source

The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment [PDF]

open access: yes, 2013
The next generation neutrino observatory proposed by the LBNO collaboration will address fundamental questions in particle and astroparticle physics.
Gavrilov, G.   +971 more
core   +1 more source

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