Authors: Daniele Bartolucci
Publish Date: 2008/11/20
Volume: 110, Issue: 1, Pages: 1-22
Abstract
Motivated by the analysis of the multiple bubbling phenomenon Bartolucci et al in Commun Partial Differ Equ 297–81241–1265 2004 for a singular mean field equation on the unit disk Bartolucci and Montefusco in Nonlinearity 19611–631 2006 for any N≥3 we characterize a subset of the 2π/Nsymmetric part of the critical set of the Nvortex singular Hamiltonian In particular we prove that this critical subset is of saddle type As a consequence of our result and motivated by a recently posed open problem Bartolucci et al in Commun Partial Differ Equ 297–81241–1265 2004 we can prove the existence of a multiple bubbling sequence of solutions for the singular mean field equation
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