Results 21 to 30 of about 57,690 (307)

Extremal Solutions of Functional Differential Inclusions

open access: yesJournal of Mathematical Analysis and Applications, 1993
Let \(X\) be a separable Banach space; \({\mathcal K}\subset X\) be a cone and \(v: [-\tau,a]\to X\) be a solution of a problem \(\dot v(t)\in F(t,v_ t)+{\mathcal K}\), \(t\in [0,a]\); \(v_ 0\geq\varphi\), where \(F\) is a Carathéodory type multifunction with convex closed values satisfying the Ambrosetti type regularity condition. The viability result
Hu, S.C.   +2 more
openaire   +2 more sources

Exact solutions for extreme black hole magnetospheres [PDF]

open access: yesJournal of High Energy Physics, 2015
We present new exact solutions of Force-Free Electrodynamics (FFE) in the Near-Horizon region of an Extremal Kerr black hole (NHEK) and offer a complete classification of the subset that form highest-weight representations of the spacetime's SL(2,R) x U(1) isometry group.
Lupsasca, Alexandru, Rodriguez, Maria
openaire   +3 more sources

Squashed, magnetized black holes in D = 5 minimal gauged supergravity

open access: yesJournal of High Energy Physics, 2018
We construct a new class of black hole solutions in five-dimensional Einstein-Maxwell-Chern-Simons theory with a negative cosmological constant. These configurations are cohomogeneity-1, with two equal-magnitude angular momenta. In the generic case, they
Jose Luis Blázquez-Salcedo   +3 more
doaj   +1 more source

From rotating to charged black holes and back again

open access: yesJournal of High Energy Physics, 2022
The mild form of the Weak Gravity Conjecture (WGC) requires higher derivative corrections to extremal charged black holes to increase their charge-to-mass ratio. This allows decay via emission of a smaller extremal black hole.
Lars Aalsma, Gary Shiu
doaj   +1 more source

Solution of Extremely Large Integral-Equation Problems [PDF]

open access: yes2007 International Conference on Electromagnetics in Advanced Applications, 2007
We report the solution of extremely large integral-equation problems involving electromagnetic scattering from conducting bodies. By orchestrating diverse activities, such as the multilevel fast multipole algorithm, iterative methods, preconditioning techniques, and parallelization, we are able to solve scattering problems that are discretized with ...
Ergül, Özgür   +2 more
openaire   +2 more sources

Upper and lower solution method for Hilfer fractional evolution equations with nonlocal conditions

open access: yesBoundary Value Problems, 2019
This paper is concerned with the existence of extremal mild solutions for Hilfer fractional evolution equations with nonlocal conditions in an ordered Banach space E.
Haide Gou, Yongxiang Li
doaj   +1 more source

A functional integral inclusion involving Carathéodories

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2003
In this paper the existence of extremal solutions of a functional integral inclusion involving Carathéodory is proved under certain monotonicity conditions.
Bapurao Dhage
doaj   +1 more source

Monotone Iterative Technique for Conformable Fractional Differential Equations with Deviating Arguments

open access: yesDiscrete Dynamics in Nature and Society, 2020
This paper is concerned with the existence of extremal solutions for periodic boundary value problems for conformable fractional differential equations with deviating arguments.
Huiling Chen, Shuman Meng, Yujun Cui
doaj   +1 more source

On Extremal Limits and Duality Orbits of Stationary Black Holes [PDF]

open access: yes, 2013
With reference to the effective three-dimensional description of stationary, single center solutions to (ungauged) symmetric supergravities, we complete a previous analysis on the definition of a general geometrical mechanism for connecting global ...
Andrianopoli, Laura   +2 more
core   +1 more source

Extremal dynamics on complex networks: Analytic solutions [PDF]

open access: yesPhysical Review E, 2005
The Bak-Sneppen model displaying punctuated equilibria in biological evolution is studied on random complex networks. By using the rate equation and the random walk approaches, we obtain the analytic solution of the fitness threshold $x_c$ to be 1/(_f+1), where _f=/ (=) in the quenched (annealed) updating case, where is the n-th moment of the degree ...
Masuda, N., Goh, K. -I., Kahng, B.
openaire   +3 more sources

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