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We study the projective logarithmic potential $\mathbb{G}_{\mu}$ of a Probability measure $\mu$ on the complex projective space $\mathbb{P}^{n}$. We prove that the Range of the operator $\mu\longrightarrow \mathbb{G}_{\mu}$ is contained in…

Complex Variables · Mathematics 2017-06-27 Fatima Zahra Assila

We study the projective logarithmic potential $G_\mu$ of a Probability measure $\mu$ on the complex projective space ${P}^{n}$ equiped with the Fubini-Study metric $\omega$. We prove that the Green operator $G $ has strong regularizing…

Complex Variables · Mathematics 2018-03-09 Said Asserda , Fatima-Zahra Assila , Ahmed Zeriahi

We provide an introduction to logarithmic potential theory in the complex plane that particularly emphasizes its usefulness in the theory of polynomial and rational approximation. The reader is invited to explore the notions of Fekete…

Classical Analysis and ODEs · Mathematics 2010-10-20 E. B. Saff

Potential theory on the complement of a subset of the real axis attracts a lot of attention both in function theory and applied sciences. The paper discusses one aspect of the theory - the logarithmic capacity of closed subsets of the real…

Complex Variables · Mathematics 2009-05-21 V. N. Dubinin , D. Karp

In this paper we study the connection between the analytic capacity of a set and the size of its orthogonal projections. More precisely, we prove that if $E\subset \mathbb C$ is compact and $\mu$ is a Borel measure supported on $E$, then…

Classical Analysis and ODEs · Mathematics 2019-01-23 Alan Chang , Xavier Tolsa

We give a direct proof of an important result of Solynin which says that the Poincar\'e metric is a strongly submultiplicative domain function. This result is then used to define a new capacity for compact subsets of the complex plane…

Complex Variables · Mathematics 2016-03-23 Daniela Kraus , Oliver Roth

There is a natural capacity associated to any vector valued Riesz kernel of a given homogeneity. If we are in the plane and the kernel is the Cauchy kernel, then this capacity is analytic capacity. Our main result states that if the…

Classical Analysis and ODEs · Mathematics 2010-12-21 Joan Mateu , Laura Prat , Joan Verdera

We consider the class of multiple Fourier series associated with functions in the Dirichlet space of the polydisc. We prove that every such series is summable with respect to unrestricted rectangular partial sums, everywhere except for a…

Classical Analysis and ODEs · Mathematics 2020-07-01 Karl-Mikael Perfekt

Trajectories in logarithmic potentials are investigated by taking as example the motion of an electron within a cylindrical capacitor. The solution of the equation of motion in plane polar coordinates, (r,{\phi}) is attained by forming a…

General Physics · Physics 2010-09-03 Erwin A. T. Wosch

Let $K\subset\mathbb{C}$ be a compact set in the plane whose logarithmic capacity $c(K)$ is strictly positive. Let $\mathscr{P}_n(K)$ be the space of monic polynomials of degree $n,$ \emph{all} of whose zeros lie in $K.$ For $p\in…

Complex Variables · Mathematics 2023-12-22 Subhajit Ghosh , Koushik Ramachandran

We obtain an analytic solution for a three-parameter class of logarithmic potentials at zero energy. The potential terms are products of the inverse square and the inverse log to powers 2, 1 and 0. The configuration space is the…

Atomic Physics · Physics 2010-11-16 A. D. Alhaidari

Let $(X,\omega)$ be a compact K\"ahler manifold. We prove that all Monge-Amp\`ere capacities are comparable. Using this we give an alternative direct proof of the integration by parts formula for non-pluripolar products recently proved by…

Complex Variables · Mathematics 2020-05-12 Chinh H. Lu

We explore a well-known integral representation of the logarithmic function, and demonstrate its usefulness in obtaining compact, easily-computable exact formulas for quantities that involve expectations and higher moments of the logarithm…

Information Theory · Computer Science 2020-02-19 Neri Merhav , Igal Sason

We investigate the connection between measure and capacity for the space of nonempty closed subsets of {0,1}*. For any computable measure, a computable capacity T may be defined by letting T(Q) be the measure of the family of closed sets…

Logic in Computer Science · Computer Science 2010-06-03 Douglas Cenzer , Paul Brodhead

We investigate the connection between measure, capacity and algorithmic randomness for the space of closed sets. For any computable measure m, a computable capacity T may be defined by letting T(Q) be the measure of the family of closed…

Logic in Computer Science · Computer Science 2015-07-01 Douglas Cenzer , Paul Brodhead , Ferit Toska , Sebastian Wyman

Probability measures with either finite Monge-Amp\`ere energy or finite entropy have played a central role in recent developments in K\"ahler geometry. In this note we make a systematic study of quasi-plurisubharmonic potentials whose…

Complex Variables · Mathematics 2020-06-15 Eleonora Di Nezza , Vincent Guedj , Chinh H. Lu

We study various capacities on compact K\"{a}hler manifolds which generalize the Bedford-Taylor Monge-Amp\`ere capacity. We then use these capacities to study the existence and the regularity of solutions of complex Monge-Amp\`ere…

Complex Variables · Mathematics 2014-02-12 Eleonora Di Nezza , Chinh H. Lu

We develop a least-squares method for computing the analytic capacity of compact plane sets with piecewise-analytic boundary. The method furnishes rigorous upper and lower bounds which converge to the true value of the capacity. Several…

Complex Variables · Mathematics 2015-12-17 Malik Younsi , Thomas Ransford

The paper deals with the theory of inner (outer) capacities on locally compact spaces with respect to general function kernels, the main emphasis being placed on the establishment of alternative characterizations of inner (outer) capacities…

Classical Analysis and ODEs · Mathematics 2022-02-07 Natalia Zorii

Let $E$ be a compact set of positive logarithmic capacity in the complex plane and let $\{P_n(z)\}_{1}^{\infty}$ be a sequence of asymptotically extremal monic polynomials for $E$ in the sense that \begin{equation*}%\label{}…

Complex Variables · Mathematics 2014-09-03 Edward B. Saff , Nikos Stylianopoulos
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