Results 231 to 240 of about 1,795 (267)

Solution of an extremal problem in operator theory

1983
Let \(E_ 1,E_ 2\) be normed linear spaces of 2\(\pi\)-periodic integrable functions, \(\Pi_ n\) be the set of all trygonometric polynomials of the order \(\leq n\). The author gives a complete solution of the problem of constructing an extremal operator in the class \(\Omega_ n^{(k)}\) of all linear operators \(u_ n(f,x):E_ 1\to E_ 2\) such that \(u_ n(
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Bioenergetics and solute uptake under extreme conditions

Extremophiles, 2001
The ion and particularly the proton and sodium ion permeabilities of cytoplasmic membranes play crucial roles in the bioenergetics of microorganisms. The proton and sodium permeabilities of membranes increase with temperature. Psychrophilic and mesophilic bacteria and mesophilic, (hyper)thermophilic, and halophilic archaea are capable of adjusting the ...
Albers, Sonja Verena, Vossenberg, Jack L., Driessen, Arnold J. M., Konings, Wil N.   +3 more
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Extremal Solutions in the Marginal Problem

1991
This is a review paper collecting both older and recent progress in the field of twodimensional marginal problem concerning the extreme points of the set of solutions. Some new results in the characterization of extremal solutions are presented in Section 5.
Viktor Benes, Josef Stepan
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Existence of solutions of extremal problems

Cybernetics and Systems Analysis, 1995
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Extremal solutions and extremal norms of linear differential inclusions of order three

Proceedings of the 45th IEEE Conference on Decision and Control, 2006
Linear differential inclusions arising in the theory of absolute stability of feedback systems with two time-varying sector nonlinearities are considered. It is shown that under controllability/observability assumptions in the case of zero Lyapunov exponent all the extremal solutions tend to the same (up to a positive scaling factor) antiperiodic ...
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Extremal solutions to a class of functional-differential equations

1997
The authors study, under Carathéodory assumptions, the existence, continuation and continuous dependence of extremal solutions to a general abstract class of hereditary differential equations of the form \(\dot{x}=g(t,x)\), \(t\in E\subset{\mathbb{R}}\), with some Volterra property assumed on \(g:E\times C(E)\rightarrow \mathbb{R}\).
CEPPITELLI, Rita, FAINA, Loris
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Extremal Solutions of Multivalued Differential Equations II

Results in Mathematics, 1989
Given a cone \(K\subset\mathbb{R}^ n\) and a set-valued differential equation \(\dot x\in F(t,x)\), \(t\in J=[0,a]\), the author wants to find an absolutely continuous solution which is minimal with respect to the ordering induced by \(K\). The assumptions on \(F\) are the following: (1) \(\| F(t,x)\|\leq c(t)(1+\| x\|)\), \(c\in L^ 1(J)\); (2) \(f(t,x)
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Thermodynamics of Extremely Diluted Aqueous Solutions

Annals of the New York Academy of Sciences, 1999
V, Elia, M, Niccoli
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Extreme point solution

2001
Saul I. Gass, Carl M. Harris
openaire   +1 more source

Extremal Constant Sign Solutions and Nodal Solutions for the Fractional p-Laplacian

Journal of Mathematical Analysis and Applications, 2021
Antonio Iannizzotto, Silvia Frassu
exaly