Regularity and two-class conjecture for isolated singularities of p-Laplacian equations

Let Q(u)=0Q'(u)=0 be the p-Laplacian type equation in a domain Ω\Omega, let ζ{0,}\zeta\in\{0,\infty\} be an isolated singular point, and let Gζ\mathcal{G}_\zeta denote the germs of positive solutions in punctured neighborhoods of ζ\zeta. For u,vGζu,v\in\mathcal{G}_\zeta, write uxζvu\underset{x\to\zeta}{\sim}v when their ratio tends to a positive constant, and call ζ\zeta a regular point when any two such germs are comparable under the relations defined by \sim, \prec, and \precsim. Suppose that admits a global positive solution and that VV has a Fuchsian type singularity at ζ\zeta. Regularity and two-class conjecture. Then: (i) ζ\zeta is a regular point of equation; (ii) equation admits a unique global positive solution of minimal growth near infinity in Ω{ζ}\Omega\setminus\{\zeta\}; and (iii) Gζ\mathcal{G}_\zeta has exactly two equivalence classes under \sim. This conjecture describes the expected classification of positive solution germs near isolated singularities, including uniqueness of the minimal-growth solution and a two-class asymptotic structure. Its resolution status is not specified in the source.

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Primary source

Martin Fraas and Yehuda Pinchover, “Isolated singularities of positive solutions of p-Laplacian type equations in R^d”, arXiv:1008.3873 (2012).

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