Now showing items 71-80 of 357
Totally disconnected sets, Jordan curves, and conformal maps
(Kluwer Academic Publishers; Akadémiai Kiadó ; Springer Science+Business Media, 1972-03)
Renormalization of the one-space dimensional Yukawa model by unitary transformation
(Elsevier, 1971-11)
A unitary transformation is used to renormalize the one-space dimensional Yukawa Model in a box. A momentum cut-off dependent sequence of unitary transformations is constructed such that weak limit matrix elements of the ...
On the link space of a Gorenstein quasihomogeneous surface singularity
(Springer-Verlag, 1983-11)
A geometric effective Nullstellensatz
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-08)
Euclidean nonlinear classical field equations with unique vacuum
(Springer-Verlag, 1978-10)
We study the real, Euclidean, classical field equation 0$$]]> where φ: ℝ d →ℝ is suitably small at infinity. We study existence and regularity assuming that λ≧0, F ∈ C ∞ (ℝ), and aF ( a )≧0∀ a ∈∝. These hypotheses allow ...
Existence, uniqueness, and nondegeneracy of positive solutions of semilinear elliptic equations
(Springer-Verlag, 1984-06)
We study positive solutions of the Dirichlet problem: Δ u ( x )+ f ( u ( x ))=0, x ∈ D n , u ( x )=0, x ∈∂ D n , where D n is an n -ball. We find necessary and sufficient conditions for solutions to be nondegenerate. We ...
On Existence of Mini-Boson Stars
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2000-12)
We prove the existence of a countable family of globally regular solutions of spherically symmetric Einstein–Klein–Gordon equations. These solutions, known as mini-boson stars, were discovered numerically many years ago.
Functions on universal algebras
(Elsevier, 1986)
In the classifying topos for any variety of algebras, all functions into the universal -algebra U from its finite powers Un are given by polynomials.