Results 51 to 60 of about 327,898 (294)
Existence of multiple positive solutions for a class of first-order periodic boundary value problems
四川大学学报. 自然科学版, 2022 We investigate the existence of multiple positive solutions for a class of first-order periodic boundary value problems. The proof of the main results is based on the theories of upper and lower solutions and Leray-Schauder degree.
WU Meng-Li
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New Positive Solutions of Nonlinear Elliptic PDEs
Applied Sciences, 2020 We are concerned with positive solutions of two types of nonlinear elliptic boundary value problems (BVPs). We present conditions for existence, uniqueness and multiple positive solutions of a first type of elliptic BVPs.
Mustafa Inc +6 more
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Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley +1 more source
Electronic Journal of Differential Equations, 2006 In this paper, we study the differential equation with the periodic boundary value $$displaylines{ u''(t)=f(t, u(t), u'(t)),quad tin [0, 2pi]cr u(0)=u(2pi), quad u'(0)=u'(2pi).
Haiyin Gao +3 more
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Electronic Journal of Qualitative Theory of Differential Equations, 2018 We provide new results concerning the existence of extremal solutions for a class of second-order problems with nonlinear functional boundary conditions where the nonlinearity considered may be discontinuous with respect to all of its variables. The main
Ruben Figueroa +2 more
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Upper and lower bounds of the norm of solutions of differential systems [PDF]
Proceedings of the American Mathematical Society, 1963 Proof. The inequality (2) follows from the Theorem 1 in [4]. To prove (3), we have to use essentially the same argument as in [4] but now we have to consider the minimal solution of u'= —g(x, u), u(a)=\z(a)\ instead of the maximal solution of u' = g(x, u), u(a) = | z(a) |. This completes the proof. Remark.
openaire +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Introduction This study investigated the safety and efficacy of single‐needle Rheocarna therapy for chronic limb‐threatening ischemia (CLTI) with wounds. Methods Six patients with CLTI involving ulcers unresponsive to revascularization underwent single‐needle Rheocarna treatment.
Yasutaka Yamauchi +9 more
wiley +1 more source
Electronic Journal of Differential Equations, 2007 This paper studies the existence and uniqueness of solutions for a type of second-order two-point boundary-value problem depending on the first-order derivative through a non-linear term.
Xiping Liu, Mei Jia
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Positive solutions for nonlinear Caputo-Hadamard fractional differential equations [PDF]
Surveys in Mathematics and its Applications, 2021 n this paper we study the existence and uniqueness of positive solutions for a class of nonlinear Caputo-Hadamard fractional differential equations by using the method of upper and lower solutions and Schauder and Banach fixed point theorems.
Salim Hamida +2 more
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Boundary Value Problems, 2021 In this article we extend the known theory of solution regions to encompass nonlinear boundary conditions. We both provide results for new boundary conditions and recover some known results for the linear case.
Marlène Frigon +2 more
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