On the torsion function for simply connected, open sets in ^2
arxiv(2024)
摘要
For an open set ⊂^2 let λ() denote the bottom of
the spectrum of the Dirichlet Laplacian acting in L^2(). Let w_ be
the torsion function for , and let ._p denote the L^p norm. It is
shown there exists η>0 such that w__∞λ()≥
1+η for any non-empty, open, simply connected set ⊂^2 with
() >0. Moreover, if the measure || of is finite, then
w__1λ()≤ (1-η)||.
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