Bifurcation of positive solutions for a semilinear equation with critical Sobolev exponent
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In this note we consider bifurcation of positive solutions to the semilinear elliptic boundary-value problem with critical Sobolev exponent
-Δu = λu - αup + u2* -1, u > 0, in Ω,
u = 0, on ∂Ω.
where Ω ⊂ ℝn, n ≥ 3 is a bounded C2-domain λ > λ1, 1 < p < 2* - 1 = n+2/n-2 and α > 0 is a bifurcation parameter. Brezis and Nirenberg  showed that a lower order (non-negative) perturbation can contribute to regain the compactness and whence yields existence of solutions. We study the equation with an indefinite perturbation and prove a bifurcation result of two solutions for this equation.
CitationCheng, Y. (2006). Bifurcation of positive solutions for a semilinear equation with critical Sobolev exponent. Electronic Journal of Differential Equations, 2006(135), pp. 1-8.
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