Results 21 to 30 of about 5,473,308 (246)

Positive solutions of second-order three-point boundary value problems with sign-changing coefficients

Electronic Journal of Qualitative Theory of Differential Equations, 2016
In this article, we investigate the boundary-value problem \begin{equation*} \begin{cases}x''(t)+h(t)f(x(t))=0,\quad t\in[0,1],\\ x(0)=\beta x'(0),\quad x(1)=x(\eta),\end{cases} \end{equation*} where $\beta\ge0$, $\eta\in(0,1)$, $f\in C([0,\infty ...
Ye Xue, Guowei Zhang
doaj   +1 more source

Existence of Nontrivial Solutions for Boundary Value Problems of Fourth-Order Differential Equations

Axioms
This article investigates the solvability problem of fourth-order differential equations with two-point boundary conditions; specifically, conclusions regarding sign-changing solutions are obtained.
Hongyu Li
doaj   +1 more source

The Existence Result for a Class of p-Kirchhoff-Type Problem with a Multilinear Growth Nonlinearity

Discrete Dynamics in Nature and Society, 2019
In this paper, we firstly discuss the existence of the least energy sign-changing solutions for a class of p-Kirchhoff-type problems with a (2p-1)-linear growth nonlinearity.
Jiangyan Yao, Wei Han
doaj   +1 more source

Multiplicity results for sign-changing solutions of an operator equation in ordered Banach space [PDF]

, 1972
summary:In this paper, we prove some multiplicity results for sign-changing solutions of an operator equation in an ordered Banach space. The methods to show the main results of the paper are to associate a fixed point index with a strict upper or lower ...
Amann, Herbert, Xu, Xian, Mawhin, Jean, Szymańska-Dębowska, Katarzyna, Wang, Bingjin   +4 more
core   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source

Comparative Drug Response Profiling in Neuroblastoma Cell Lines and Patient‐Derived Tumor Organoids

Pediatric Blood &Cancer, EarlyView.
ABSTRACT High‐risk neuroblastoma remains a leading cause of pediatric cancer mortality, and improved preclinical models are needed to guide therapeutic developments. We screened seven high‐risk neuroblastoma cell lines and three patient‐derived tumor organoids with 528 compounds alongside bone marrow controls, and compared them with external datasets ...
Krzysztof Wierbiłowicz, Se Whee Sammy Park, Aironas Los, Ernest Liu, Nona Struyf, Tom Erkers, Sören Lehmann, Jan J. Molenaar, Jakob Stenman, Olli Kallioniemi, Päivi Östling, Brinton Seashore‐Ludlow, Kasper Karlsson   +12 more
wiley   +1 more source

Least energy nodal solutions for Kirchhoff-type problems involving the critical exponents

Bulletin of Mathematical Sciences
In this paper, we concern the existence of sign-changing solutions for the following Kirchhoff-type problems with critical growth: −a+b∫Ω|∇u|2dxΔu=μ|u|q−2u+|u|4uin Ω,u=0on ∂Ω.
Binlin Zhang, Junshan Tian, Xiumei Han
doaj   +1 more source

A Sign-Changing Solution for a Superlinear Dirichlet Problem [PDF]

, 1997
We show that a superlinear boundary value problem has at least three nontrivial solutions. A pair are of one sign (positive and negative, respectively), and the third solution changes sign exactly once. The critical level of the sign-changing solution is
Neuberger, John M, Cossio, Jorge, Castro, Alfonso   +2 more
core  

On sign-changing solutions for nonlinear operator equations [PDF]

, 2006
In this paper, the existence of sign-changing solutions for nonlinear operator equations is discussed by using the topological degree and fixed point index theory. The main theorems are some new three-solution theorems which are different from the famous
Li, Fuyi, Li, Yuhua, Zhang, Qi, Yuhua Li, Zhanping Liang, Qi Zhang, Fuyi Li, Liang, Zhanping   +7 more
core   +1 more source

Retrospective Analysis of Donor Lymphocyte Infusions in Pediatric Patients With Mixed Chimerism After Hematopoietic Stem Cell Transplantation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Allogeneic hematopoietic stem cell transplantation (alloHSCT) is an essential therapy for several malignant and nonmalignant diseases, but relapse and graft loss remain the principal threats to its success. Routine monitoring of chimerism and minimal residual disease (MRD) enables early detection of imminent recurrence and guides ...
Carmen Junk, Sebastian Michaelis, Michaela Döring, Thomas Eichholz, Ursula Holzer, Martin Ebinger, Tim Flaadt, Rupert Handgretinger, Peter Lang, Jan Frederic Weller, Markus Mezger   +10 more
wiley   +1 more source