نتایج جستجو برای: method of upper or lower solutions
تعداد نتایج: 21419984 فیلتر نتایج به سال:
in reality, most structures involved in geotechnical engineering are three dimensional in nature, and although in many, plane strain or axisymmetric approximations are reasonable, there are some, for which 3-d treatment is required. the quantity of data, and the size of the various vectors and matrices involved in such analysis, increase dramatically. this has sever implications for computer r...
Abstract In this paper, we investigate a class of nonlocal boundary value problems nonlinear fractional functional differential coupled systems with state dependent delays. The method upper and lower solutions is established some new results for the multiplicity problem are obtained. An example also presented to illustrate our main results.
Abstract The aim of this paper is to consider a fully cantilever beam equation with one end fixed and the other connected resilient supporting device, that is, $$ \textstyle\begin{cases} u^{(4)}(t)=f(t,u(t),u'(t),u''(t),u'''(t)), \quad t\in [0,1], \\ u(0)=u'(0)=0, u''(1)=0,\qquad u'''(1)=g(u(1)), \end{cases} {...
abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...
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