Imperfect bifurcations in nonlinear
elliptic equations on spherical caps
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1.
Mathematische Institut, Universät Basel, Rheinsprung 21, CH-4051 Basel
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2.
Department of Mathematical Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531
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3.
Department of Mathematics, Meiji University, 1-1-1 Higashi-mita, Tama-ku, Kawasaki, 214-8571