Results 81 to 90 of about 1,720,412 (231)

Formulation of some self-consistent tasks of radio electronics

open access: yesФизика волновых процессов и радиотехнические системы, 2018
The self-consistent problem of electromagnetism is defined as a closed mathematical cycle in which the primary sources of the electromagnetic field are corrected by the inverse effect of secondary sources arising from them as a result of the interaction ...
K.I. Kisilenko   +3 more
doaj  

Solvability of boundary value problems for nonlinear functional difference equations

open access: yesLe Matematiche, 2010
Sufficient conditions for the existence of solutions of the periodic and anti-periodic boundary value problems for nonlinear functional difference equations are established, respectively.
Yuji Liu
doaj  

k-dimensional nonlocal boundary-value problems at resonance

open access: yesElectronic Journal of Differential Equations, 2015
In this article we show the existence of at least one solution to the system of nonlocal resonant boundary-value problem $$ x''=f(t,x), \quad x'(0)=0, \quad x'(1)=\int_{0 }^{1}x'(s)\,dg(s), $$ where $f:[0,1]\times\mathbb{R}^k\to\mathbb{R}^k$, $g:[0 ...
Katarzyna Szymanska-Debowska
doaj  

Home - About - Disclaimer - Privacy