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Finite Morse index solutions and asymptotics of weighted nonlinear elliptic equations
By introducing a suitable setting, we study the behavior of finite Morse
index solutions of the equation
-\{div} (|x|^\theta \nabla v)=|x|^l |v|^{p-1}v \;\;\; \{in $\Omega \subset
\R^N \; (N \geq 2)$}, \leqno(1) where , with
, , and is a bounded or unbounded domain.
Through a suitable transformation of the form , equation
(1) can be rewritten as a nonlinear Schr\"odinger equation with Hardy potential
-\Delta u=|x|^\alpha |u|^{p-1}u+\frac{\ell}{|x|^2} u \;\; \{in $\Omega
\subset \R^N \;\; (N \geq 2)$}, \leqno{(2)} where , and .
We show that under our chosen setting for the finite Morse index theory of
(1), the stability of a solution to (1) is unchanged under various natural
transformations. This enables us to reveal two critical values of the exponent
in (1) that divide the behavior of finite Morse index solutions of (1),
which in turn yields two critical powers for (2) through the transformation.
The latter appear difficult to obtain by working directly with (2)
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