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First steps of the global bifurcation theory in the plane
P. 145-158.
We present here a survey of the first results and problems in the global bifurcation theory in the plane. For sake of compactness we consider the Sphere S2 rather than the plane. The results of this paper are obtained in collaboration with my students N.Goncharuk, Yu.Kudriashov, I.Schurov, N.Solodovnikov, L.Starichkova.
In book
Vol. 734: Differential Equations, Mathematical Physics, and Applications: Selim Grigorievich Krein Centennial. , Providence : AMS, 2019