In this paper, the author considers semilinear elliptic equations of the form $-Delta u- fraclambdax2u +b(x),h(u)=0$ in $Omegasetminus0$, where $lambda$ is a parameter with $-infty0$. The author completely classifies the behaviour near zero of all positive solutions of equation (0.1) when $h$ is regularly varying at $infty$ with index $q$ greater than $1$ (that is, $limtto infty h(xi t)/h(t)=xiq$ for every $xi0$). In particular, the author's results apply to equation (0.1) with $h(t)=tq (log t)alpha1$ as $tto infty$ and $b(x)=xtheta (-log x)alpha2$ as $xto 0$, where $alpha1$ and $alpha2$ are any real numbers.
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Florica C. Cirstea, University of Sydney, Australia
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