Super-positionof spikes for a slightly super-critical elliptic equation in$RR^N$
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We prove existence of radial positive
solutions for the equation
$
-\Delta u + V(y) u =u^{\frac{N+2}{N-2}+\varepsilon} \quad$ in
$\quad \mathbb R^N$
where the potential $V$ is a radial smooth function with $V(0)
In particular, we show that the solutions have the shape of a
super-position of spikes blowing-up at the origin as $\varepsilon
\to 0$, with different rates of concentration.