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Let $\Omega$ be a bounded domain in $\R^n$, $n\ge 3$ with smooth boundary $\partial\Omega$ and a small hole. We give the first example of sign-changing {\it bubbling} solutions to the nonlinear elliptic problem $$   -\Delta u=|u|^{{n+2\over n-2} +\ve -1 } u \, \, \mbox{ in } \Omega , \quad \quad   u=0 \mbox{ on } \partial \Omega, $$ where $\ve$ is a small positive parameter. The basic cell in the construction is the sign-changing nodal solution to the critical Yamabe problem $$ -\Delta w = |w|^{\frac{4}{n-2}} w, \ \ w \in {\mathcal D}^{1,2} (\R^n) $$ which has large number ($3n$) of kernels.

Sign-changing blowing-up solutions for supercritical Bahri–Coron’s problem