نتایج جستجو برای: nonexistence and existence

تعداد نتایج: 16843225  

Journal: :Mathematische Nachrichten 2023

It is proven results about existence and nonexistence of unit normal sections submanifolds the Euclidean space sphere, which associated Gauss maps, are harmonic. Some applications to constant mean curvature hypersurfaces sphere isoparametric obtained too.

Journal: :Discrete and Continuous Dynamical Systems - Series B 2016

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1376

‏‎‏‎utopia has, for four centuries, accompanied that hope of progress and that striving for betterment. it now straggles against a widespread sense that this has been an illusion, or an impossible dream. the utopian idea can never entirely disappear, but utopia as a form of the social imagination has clearly weakened. if it cannot instill its vision in the public consciousness, the consequences...

2009
Lingju Kong QINGKAI KONG

We study the nonlinear boundary value problem consisting of the equation y+w(t)f(y) = 0 on [a, b] and a multi-point boundary condition. By relating it to the eigenvalues of a linear Sturm-Liouville problem with a twopoint separated boundary condition, we obtain results on the existence and nonexistence of nodal solutions of this problem. We also discuss the changes of the existence of different...

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