Results 21 to 30 of about 721,614 (296)
On the Extremality of Harmonic Beltrami Coefficients
Mathematics, 2022 We prove a general theorem, which provides a broad collection of univalent functions with equal Grunsky and Teichmüller norms and thereby the Fredholm eigenvalues and the reflection coefficients of associated quasicircles. It concerns an important problem to establish the exact or approximate values of basic quasiinvariant functionals of Jordan curves,
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Uniqueness of near-horizon geometries of rotating extremal AdS(4) black holes [PDF]
, 2009 We consider stationary extremal black hole solutions of the Einstein-Maxwell equations with a negative cosmological constant in four dimensions. We determine all non-static axisymmetric near-horizon geometries and all static near-horizon geometries for ...
Lucietti, James, Kunduri, Hari K.
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Precision bootstrap for the N $$ \mathcal{N} $$ = 1 super-Ising model
Journal of High Energy Physics, 2022 In this note we report an improved determination of the scaling dimensions and OPE coefficients of the minimal supersymmetric extension of the 3d Ising model using the conformal bootstrap. We also show how this data can be used as input to the Lorentzian
Alexander Atanasov +4 more
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Remote Sensing, 2020 Accounting for endmember variability is a challenging issue when unmixing hyperspectral data. This paper models the variability that is associated with each endmember as a conical hull defined by extremal pixels from the data set.
Tatsumi Uezato +2 more
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On the modulus of extremal Beltrami coefficients
Kyoto Journal of Mathematics, 2006 Let $R$ be a hyperbolic Riemann surface. Suppose the Teichmuller space $T(R)$ of $R$ is infinite-dimensional. Let $\mu$ be an extremal Beltrami coefficient on $R$ and let $[\mu ]$ be the point in $T(R)$. In this note, it is shown that if $\mu$ is not uniquely extremal, then there exists an extremal Beltrami coefficient $\nu$ in $[\mu ]$ with non ...
Yao, Guowu, Qi, Yi
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Characterizing extremal coefficient functions and extremal correlation functions
, 2012 We focus on two dependency quantities of a max-stable random field $X$ on some space $T$: the extremal coefficient function $θ$ which we define on finite sets of $T$ and the extremal correlation function $χ(s,t)=\lim_{x \uparrow \infty} \PP(X_s \geq x \mid X_t \geq x)$.
Strokorb, Kirstin, Schlather, Martin
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On extremality of two connected locally extremal Beltrami coefficients [PDF]
Bulletin of the Australian Mathematical Society, 2005 Let Ω1 and Ω2 be two domains in the complex plane with a nonempty intersection. Suppose that μj are locally extremal Beltrami coefficients in Ωj (j = 1, 2) respectively. In 1980, Sheretov posed the problem: Will the coefficient μ defined by the condition μ(z) = μj(z) for z ∈ Ωj, j = 1, 2, be locally extremal in Ω1 ∪ Ω2? We give a counterexample to show
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Proof of the weak gravity conjecture from black hole entropy
Journal of High Energy Physics, 2018 We prove that higher-dimension operators contribute positively to the entropy of a thermodynamically stable black hole at fixed mass and charge. Our results apply whenever the dominant corrections originate at tree level from quantum field theoretic ...
Clifford Cheung +2 more
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Extremal connectedness of hedge funds [PDF]
, 2022 peer reviewedWe propose a dynamic measure of extremal connectedness tailored to the short reporting period and unbalanced nature of hedge funds data. Using multivariate extreme value regression techniques, we estimate this measure conditional on factors ...
Hambuckers, Julien +5 more
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Extremal effective field theories
Journal of High Energy Physics, 2021 Effective field theories (EFT) parameterize the long-distance effects of short-distance dynamics whose details may or may not be known. Previous work showed that EFT coefficients must obey certain positivity constraints if causality and unitarity are ...
Simon Caron-Huot, Vincent Van Duong
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