Zobrazeno 1 - 10
of 50
pro vyhledávání: '"P. Ch. Tsamatos"'
Autor:
Kyriakos Mavridis, P. Ch. Tsamatos
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2004, Iss 8, Pp 1-18 (2004)
In this paper we study a boundary value problem for a first order functional differential equation on an infinite interval. Using fixed point theorems on appropriate cones in Banach spaces, we derive multiple positive solutions for our boundary value
Externí odkaz:
https://doaj.org/article/8f771899159e457caa844f938883706d
Autor:
P. Ch. Tsamatos, S. K. Ntouyas
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 19, Iss 2, Pp 335-342 (1996)
Existence results for a second order boundary value problem for functional differential equation, are givn. The results are based on the nonlinear Alternative, of Leray-Schauder and rely on a priori bounds on solutions. These results are generalizati
Externí odkaz:
https://doaj.org/article/d271106ea44948c8a0285cdcf0351793
Autor:
S. K. Ntouyas, P. Ch. Tsamatos
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 14, Iss 3, Pp 509-516 (1991)
In this paper, using a simple and classical application of the Leray-Schauder degree theory, we study the existence of solutions of the following boundary value problem for functional differential equations x″(t)+f(t,xt,x′(t))=0, t∈[0,T]x0+αx
Externí odkaz:
https://doaj.org/article/dc6fcbe719f249d0850117a6a982e84d
Publikováno v:
Funkcialaj Ekvacioj. 50:213-259
This article is concerned with second order nonlinear delay, and especially ordinary, differential equations. By the use of the fixed point technique based on the classical Schauder's theorem, for any given line, sufficient conditions are established
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9202918f2ec1c6ec105b3241abe275fe
https://doi.org/10.1619/fesi.50.213
https://doi.org/10.1619/fesi.50.213
Publikováno v:
Mathematical and Computer Modelling. 43(7-8):854-869
The paper is concerned with an initial value problem to second order nonlinear singular delay differential equations. By the use of the Schauder fixed point theorem, a result for the existence of global solutions is derived. Also, via the Banach cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a5c5a68af432f3ee52b239a1fbf1242
Publikováno v:
Archiv der Mathematik. 86:163-175
By using the Schauder fixed point theorem, we establish a result for the existence of solutions of a boundary value problem on the half-line to second order nonlinear delay differential equations. We also present the application of our result to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4e71069f5070d25727560e69e35a231
https://doi.org/10.1007/s00013-005-1155-y
https://doi.org/10.1007/s00013-005-1155-y
Publikováno v:
Nonlinear Analysis: Theory, Methods & Applications. 59:1157-1179
This article is concerned with solutions that behave asymptotically like polynomials for nth order (n > 1) nonlinear ordinary differential equations. For each given integer m with 1 less than or equal to m less than or equal to n - 1, sufficient cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d7bb32cf48d1e1badf37627ddda7e63
https://doi.org/10.1016/j.na.2004.08.011
https://doi.org/10.1016/j.na.2004.08.011
Publikováno v:
Applicable Analysis. 83:957-970
The existence of triple solutions for a second-order nonlocal functional boundary value problem is proved by using a fixed-point theorem on cones in Banach spaces due to Leggett and Williams. The obtained results are new even in the ordinary case for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a48b5f5597a1ebcd0f86abe752b0b15b
https://doi.org/10.1080/00036810410001724571
https://doi.org/10.1080/00036810410001724571
Autor:
P. Ch. Tsamatos, K. G. Mavridis
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2004, Iss 8, Pp 1-18 (2004)
1. IntroductionBoundaryvalueproblemsonin nite intervalsappearinmanyproblemsofpracti-cal interest, for example in linear elasticity problems, nonlinear uid ow problemsand foundation engineering (see e.g. [1,10,16] and the references therein). Thisis t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::529b4fa9817c7263e2b89e73afc2cc2e
http://www.math.u-szeged.hu/ejqtde/periodica.html?periodica=1¶mtipus_ertek=publication¶m_ertek=185
http://www.math.u-szeged.hu/ejqtde/periodica.html?periodica=1¶mtipus_ertek=publication¶m_ertek=185
Autor:
P. Ch. Tsamatos
Publikováno v:
Annales Polonici Mathematici. 83:231-242
Annales Polonici Mathematici
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e5e029a3cbbb36ae54a588889a59ebd
https://doi.org/10.4064/ap83-3-5
https://doi.org/10.4064/ap83-3-5