Results 21 to 30 of about 2,568 (67)

The joint survival super learner: A super learner for right‐censored data

Statistica Neerlandica, Volume 80, Issue 2, May 2026.
ABSTRACT Risk prediction models are widely used to guide real‐world decision‐making in areas such as healthcare and economics, and they also play a key role in estimating nuisance parameters in semiparametric inference. The super learner is a machine learning framework that combines a library of prediction algorithms into a meta‐learner using cross ...
Anders Munch, Thomas A. Gerds
wiley   +1 more source

Loss Behavior in Supervised Learning With Entangled States

Advanced Quantum Technologies, Volume 9, Issue 4, April 2026.
Entanglement in training samples supports quantum supervised learning algorithm in obtaining solutions of low generalization error. Using analytical as well as numerical methods, this work shows that the positive effect of entanglement on model after training has negative consequences for the trainability of the model itself, while showing the ...
Alexander Mandl, Johanna Barzen, Marvin Bechtold, Frank Leymann, Lavinia Stiliadou   +4 more
wiley   +1 more source

How many zeros of a random polynomial are real?

, 1993
We provide an elementary geometric derivation of the Kac integral formula for the expected number of real zeros of a random polynomial with independent standard normally distributed coefficients.
Edelman, Alan, Kostlan, Eric
core   +3 more sources

Function spaces for decoupling

Journal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract We introduce new function spaces LW,sq,p(Rn)$\mathcal {L}_{W,s}^{q,p}(\mathbb {R}^{n})$ that yield a natural reformulation of the ℓqLp$\ell ^{q}L^{p}$ decoupling inequalities for the sphere and the light cone. These spaces are invariant under the Euclidean half‐wave propagators, but not under all Fourier integral operators unless p=q$p=q$, in ...
Andrew Hassell, Pierre Portal, Jan Rozendaal, Po‐Lam Yung   +3 more
wiley   +1 more source

Group Theory of Non-Abelian Vortices

, 2010
We investigate the structure of the moduli space of multiple BPS non-Abelian vortices in U(N) gauge theory with N fundamental Higgs fields, focusing our attention on the action of the exact global (color-flavor diagonal) SU(N) symmetry on it.
A Gorsky, A Hanany, A Hanany, ACW Kotcheff, D Dorigoni, K Hashimoto, K Itoh, Keisuke Ohashi, Kenichi Konishi, L Ferretti, M Bando, M Bando, M Bando, M Bordemann, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Eto, M Nitta, M Nitta, M Shifman, M Shifman, MA Luty, Minoru Eto, Muneto Nitta, N Seiberg, N Seiberg, NA Nekrasov, NJ Hitchin, R Auzzi, R Auzzi, R Auzzi, SB Gudnason, SB Gudnason, Sven Bjarke Gudnason, T Fujimori, Toshiaki Fujimori, W Buchmüller, Y Isozumi, Yunguo Jiang   +49 more
core   +1 more source

On the Fourier transform of random Bernoulli convolutions

Journal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract We investigate random Bernoulli convolutions, namely, probability measures given by the infinite convolution where ω=(λk)$\omega =(\lambda _k)$ is a sequence of i.i.d. random variables each following the uniform distribution on some fixed interval. We study the regularity of these measures and prove that when expElogλ1>2π$\exp \mathbb {E}\left(
Simon Baker, Henna Koivusalo, Sascha Troscheit, Xintian Zhang   +3 more
wiley   +1 more source

A Miyaoka–Yau inequality for hyperplane arrangements in CPn$\mathbb {CP}^n$

Journal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract Let H$\mathcal {H}$ be a hyperplane arrangement in CPn$\mathbb {CP}^n$. We define a quadratic form Q$Q$ on RH$\mathbb {R}^{\mathcal {H}}$ that is entirely determined by the intersection poset of H$\mathcal {H}$. Using the Bogomolov–Gieseker inequality for parabolic bundles, we show that if a∈RH$\mathbf {a}\in \mathbb {R}^{\mathcal {H}}$ is ...
Martin de Borbon, Dmitri Panov
wiley   +1 more source

Unitarily invariant valuations on convex functions

Journal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract Continuous, dually epi‐translation invariant valuations on the space of finite‐valued convex functions on Cn$\mathbb {C}^n$ that are invariant under the unitary group are investigated. It is shown that elements belonging to the dense subspace of smooth valuations admit a unique integral representation in terms of two families of Monge–Ampère ...
Jonas Knoerr
wiley   +1 more source

Minimal coupling in oscillator models of quantum dissipation

, 2012
The dissipative harmonic oscillator has two representations. In the first representation the central oscillator couples with its position to an oscillator bath. In the second one it couples with its momentum to the bath.
Bhaktavatsala Rao, Bhaktavatsala Rao, Castro Neto, Cohen-Tannoudji, Cuccoli, Cuccoli, Cuccoli, F. Sols, Grabert, H. Kohler, Kohler, Kohler, Kohler, Leggett, Novais, Sánchez-Cañizares, Ullersma, Weiss   +17 more
core   +1 more source

Khintchine‐type theorems for weighted uniform inhomogeneous approximations via transference principle

Mathematika, Volume 72, Issue 2, April 2026.
Abstract In 2019 Kleinbock and Wadleigh proved a “zero‐one law” for uniform inhomogeneous Diophantine approximations. We generalize this statement to arbitrary weight functions and establish a new and simple proof of this statement, based on the transference principle. We also give a complete description of the sets of g$g$‐Dirichlet pairs with a fixed
Vasiliy Neckrasov
wiley   +1 more source