Results 21 to 30 of about 8,669,989 (253)

Method of upper lower solutions for nonlinear system of fractional differential equations and applications

Malaya Journal of Matematik, 2018
Our aim is to develop the method of upper lower solutions and apply it to prove existence and uniqueness ofsolution of periodic boundary value problems for a system of fractional differential equations involving a Riemann- Liouville fractional derivatives.
null D.B. Dhaigude, null N.B. Jadhav, null J.A. Nanware   +2 more
openaire   +1 more source

Well-Ordered and Non-Well-Ordered Lower and Upper Solutions for Periodic Planar Systems

Advanced Nonlinear Studies, 2021
The aim of this paper is to extend the theory of lower and upper solutions to the periodic problem associated with planar systems of differential equations.
Fonda Alessandro, Klun Giuliano, Sfecci Andrea   +2 more
doaj   +1 more source

Extremal Solutions of Generalized Caputo-Type Fractional-Order Boundary Value Problems Using Monotone Iterative Method

Fractal and Fractional, 2022
The aim of this research work is to derive some appropriate results for extremal solutions to a class of generalized Caputo-type nonlinear fractional differential equations (FDEs) under nonlinear boundary conditions (NBCs).
Choukri Derbazi, Zidane Baitiche, Mohammed S. Abdo, Kamal Shah, Bahaaeldin Abdalla, Thabet Abdeljawad   +5 more
doaj   +1 more source

The method of upper, lower solutions and monotone iterative scheme for higher order hyperbolic partial differential equations [PDF]

Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics, 1989
AbstractUniformly monotone convergent iterative methods for obtaining multiple solutions of (n + m)th order hyperbolic partial differential equations together with initial conditions are discussed. Appropriate partial differential inequalities which connect upper and lower solutions, and variation of parameters formula is developed.
openaire   +1 more source

Lower and Upper Solutions Method for Positive Solutions of Fractional Boundary Value Problems

Abstract and Applied Analysis, 2013
We apply the lower and upper solutions method and fixed-point theorems to prove the existence of positive solution to fractional boundary value problem D0+αut+ft,ut=0 ...
R. Darzi, B. Mohammadzadeh, A. Neamaty, D. Bǎleanu   +3 more
doaj   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan, Michael Abele, Calogero Virgone, Michaela Kuhlen, Ricardo Lopez‐Almarez, Tal Ben‐Ami, Ewa Bien, Maja Cesen, Malgorzata A. Krawczyk, Andrea Ferrari, Gianni Bisogno, Yves Reguerre, Dominik T. Schneider, Louise Galmiche, Jorg Fuchs, Sarah Braungart, Bilgehan Yalcin, Ines B. Brecht, Daniel Orbach   +18 more
wiley   +1 more source

Existence and multiplicity results for first-order Stieltjes differential equations

Advanced Nonlinear Studies, 2022
In this article, we establish existence and multiplicity results for first-order Stieltjes differential equations satisfying a periodic boundary condition or an initial value condition.
Maia Lamiae, El Khattabi Noha, Frigon Marlène   +2 more
doaj   +1 more source

Monotone Iterative Method for ψ-Caputo Fractional Differential Equation with Nonlinear Boundary Conditions

Fractal and Fractional, 2021
The main contribution of this paper is to prove the existence of extremal solutions for a novel class of ψ-Caputo fractional differential equation with nonlinear boundary conditions.
Zidane Baitiche, Choukri Derbazi, Jehad Alzabut, Mohammad Esmael Samei, Mohammed K. A. Kaabar, Zailan Siri   +5 more
doaj   +1 more source

Global Efforts to Reduce Paediatric Cancer Care Disparities in Radiotherapy: A Decade Change

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background We present an update on the status, needs and challenges faced by paediatric imaging and radiotherapy (RT) programmes globally after a previous survey conducted by the International Atomic Energy Agency (IAEA) 10 years prior. Methods We developed and distributed a 121‐question survey to radiation oncologists, medical physicists and ...
Raymond B. Mailhot Vega, Daniel J. Indelicato, Jeanette Parkes, Natia Esiashvili, Josué Hernández Benítez, Miriam Mikhail‐Lette, Olivera Cirajc Bjelac, Daniel Berger, Eva Ciurana, Yavuz Anacak, Lisbeth Cordero‐Mendez   +10 more
wiley   +1 more source

Neuropsychological and Educational Outcomes in Shwachman–Diamond Syndrome—A Report From the North American Shwachman–Diamond Syndrome Registry

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Shwachman–Diamond syndrome (SDS) is a rare autosomal recessive ribosomopathy characterized by bone marrow failure and multisystem involvement, with emerging evidence of associated neurocognitive impairment. Methods We conducted a retrospective study of 240 individuals with biallelic Shwachman–Bodian–Diamond syndrome (SBDS) mutations
Jane Koo, Melissa Gerstle, Leah Cheng, Richard Cooper, Katherine Coyne, Claire Dusa, Naomi E. Joffe, Diana Schwarz, Sarah Steltz, Akiko Shimamura, Kasiani C. Myers, Thea Quinton   +11 more
wiley   +1 more source