Ueber Relationen, welche für die zwischen je zwei singulären Punkten erstreckten Integrale der Lösungen linearer Differentialgleichungen stattfinden.
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L. Fuchs (1873)
Journal für die reine und angewandte Mathematik
L. Pochhammer (1871)
Journal für die reine und angewandte Mathematik
Giesl, P. (2003)
Acta Mathematica Universitatis Comenianae. New Series
Ivanov, Vladimir V., Volokitin, Evgenii P. (2005)
Electronic Journal of Differential Equations (EJDE) [electronic only]
Eduardo Sáez, Iván Szántó (2012)
Applications of Mathematics
In this paper we consider a class of cubic polynomial systems with two invariant parabolas and prove in the parameter space the existence of neighborhoods such that in one the system has a unique limit cycle and in the other the system has at most three limit cycles, bounded by the invariant parabolas.
Xie, Xiangdong, Chen, Fengde, Zhan, Qingyi (2010)
Discrete Dynamics in Nature and Society
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