Results 31 to 40 of about 327,898 (294)
Existence of solutions for a class of elastic beam problems with simply supported ends
四川大学学报. 自然科学版, 2022 We in this paper study the existence of solutions for a class of elastic beam problems with simply supported ends. The proof of the main results is based on the method of lower and upper solutions and the Elias's inequality.
MA Ya-Wei, MA Ru-Yun
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A Lower/Upper Solutions Result for Generalised Radial p-Laplacian Boundary Value Problems [PDF]
, 2023 We provide existence results to some planar nonlinear boundary value problems, in the presence of lower and upper solutions. Our results apply to a class of systems generalising radial elliptic equations driven by the p-Laplace operator, and to some ...
Fonda A. +3 more
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Monotone iterative method for two-point fractional boundary value problems
Advances in Difference Equations, 2018 In this work, we deal with two-point Riemann–Liouville fractional boundary value problems. Firstly, we establish a new comparison principle. Then, we show the existence of extremal solutions for the two-point Riemann–Liouville fractional boundary value ...
Bo Tang, Jing Zhao, Zhenhai Liu
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Examples of the nonexistence of a solution in the presence of upper and lower solutions
The ANZIAM Journal, 2003 AbstractStandard results for boundary value problems involving second-order ordinary differential equations ensure that the existence of a well-ordered pair of lower and upper solutions together with a Nagumo condition imply existence of a solution.
Habets, Patrick, Pouso, RL
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Upper and lower bound solutions for lateral-torsional buckling of doubly symmetric members
, 2016 A family of three finite elements is developed for the lateral-torsional buckling analysis of thin-walled members with doubly symmetric cross-sections.
Sahraei, Arash, Mohareb, Magdi
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Solving ill-posed bilevel programs [PDF]
, 2016 This paper deals with ill-posed bilevel programs, i.e., problems admitting multiple lower-level solutions for some upper-level parameters. Many publications have been devoted to the standard optimistic case of this problem, where the difficulty is ...
Zemkoho, Alain B., Alain B. Zemkoho
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Lower and upper solutions for delay evolution equations with nonlocal and impulsive conditions
, 2022 In this article, we apply the method of lower and upper solutions for studying delay evolution equations with nonlocal and impulsive conditions in infinite dimensional Banach spaces.
Zhang, Xuping
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Upper and Lower Solutions and Topological Degree
Journal of Mathematical Analysis and Applications, 1999 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Open Mathematics, 2022 In this article, we are concerned with the periodic solutions of first-order difference equation Δu(t−1)=f(t,u(t))−s,t∈Z,(P)\Delta u\left(t-1)=f\left(t,u\left(t))-s,\hspace{1em}t\in {\mathbb{Z}},\hspace{1.0em}\hspace{1.0em}\left(P) where s∈Rs\in {\mathbb{
Zhao Jiao, Ma Ruyun
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Osteosarcoma (OS) and Ewing sarcoma (EWS) are the most common primary bone cancers in children, but acute thrombosis is poorly characterized in this population. Our study evaluated the rates of venous thromboembolism (VTE) and associated risk factors in pediatric patients with bone sarcomas treated over a 10‐year period encompassing
Sarah Kappa +8 more
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