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Displaying 121 –
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Let be a -subharmonic function with associated measure , and let be a superharmonic function with associated measure , on an open set . For any closed ball , of centre and radius , contained in , let denote the mean value of over the surface of the ball. We prove that the upper and lower limits as with of the quotient , lie between the upper and lower limits as of the quotient . This enables us to use some well-known measure-theoretic results to prove new variants and generalizations...
Some results concerning the multiply superharmonic functions and the boundary behaviour are given and some problems involving these notions are described.
This note verifies a conjecture of Král, that a continuously differentiable function, which is subharmonic outside its critical set, is subharmonic everywhere.
2000 Mathematics Subject Classification: Primary 26A33; Secondary
47G20, 31B05We study a singular value problem and the boundary Harnack principle
for the fractional Laplacian on the exterior of the unit ball.
Let ũ denote the conjugate Poisson integral of a function . We give conditions on a region Ω so that , the Hilbert transform of f at x, for a.e. x. We also consider more general Calderón-Zygmund singular integrals and give conditions on a set Ω so that is a bounded operator on , 1 < p < ∞, and is weak (1,1).
Let be an elliptic differential operator of second order with variable coefficients. In this paper it is proved that any -superharmonic function in the Riesz-Brelot sense is locally summable and satisfies the -superharmonicity in the sense of Schwartz distribution.
The classical Mittag-Leffler theorem on meromorphic functions is extended to the case of functions and hyperfunctions belonging to the kernels of linear partial differential operators with constant coefficients.
This paper shows that some characterizations of the harmonic majorization of the Martin function for domains having smooth boundaries also hold for cones.
The note develops results from [5] where an invariance under the Möbius transform mapping the upper halfplane onto itself of the Weinstein operator on is proved. In this note there is shown that in the cases , no other transforms of this kind exist and for case , all such transforms are described.
We construct bounded domains D not equal to a ball in n ≥ 3 dimensional Euclidean space, Rn, for which ∂D is homeomorphic to a sphere under a quasiconformal mapping of Rn and such that n - 1 dimensional Hausdorff measure equals harmonic measure on ∂D.
Currently displaying 121 –
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