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math-ph2017
On the symmetric central configurations for the planar 1+4-body problem
Chunhua Deng, Shiqing Zhang
We study the planar symmetric central configurations of the -body problem where the symmetry axis does not contain any infinitesimal masses. Under certain assumptions we find…
math.DS2017
On mountain pass theorem and its application to periodic solutions of some nonlinear discrete systems
Liang Ding, Jinlong Wei, Shiqing Zhang
We obtain a new quantitative deformation lemma, and then gain a new mountain pass theorem. More precisely, the new mountain pass theorem is independent of the functional value on t…