Results 111 to 120 of about 5,204 (224)

An extension of Minkowski's singular function

Applied Mathematics Letters, 1995
The authors introduce a family of continuous strictly increasing singular (Cantor type) functions \(g_\lambda :[0,1]\rightarrow [0,1]\), \(\lambda \in (0,1)\). The Hausdorff dimension of the set of points where \(g_\lambda \) has a nonvanishing derivative is computed.
Tichy, R.F., Uitz, J.
openaire   +2 more sources

Validation of machine learning based scenario generators

Journal of Risk and Insurance, Volume 93, Issue 2, Page 508-533, June 2026.
Abstract Machine learning (ML) methods are becoming increasingly important for designing economic scenario generators for internal models. Validating data‐driven models requires different methods than validating classical, theory‐based models. We discuss two novel aspects of such validation: first, checking the multivariate distribution of risk factors,
Gero Junike, Solveig Flaig, Ralf Werner
wiley   +1 more source

Sharp estimates for the Laplacian torsional rigidity with negative Robin boundary conditions

Bulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.
Abstract Motivated by pioneering works of Bandle and Wagner, given a bounded Lipschitz domain Ω⊂Rd$\Omega \subset \mathbb {R}^d$ with d⩾3$d\geqslant 3$, we consider the Robin–Laplacian torsional rigidity τα(Ω)$\tau _\alpha (\Omega)$ with negative boundary parameter α$\alpha$ and we show that sharp inequalities for τα(Ω)$\tau _\alpha (\Omega)$ hold if ...
Nunzia Gavitone, David Krejčiřík, Gloria Paoli   +2 more
wiley   +1 more source

Thurston norm for coherent right‐angled Artin groups via L2$L^2$‐invariants

Journal of Topology, Volume 19, Issue 2, June 2026.
Abstract We define a new notion of splitting complexity for a group G$G$ along a non‐trivial integral character ϕ∈H1(G;Z)$\phi \in H^1(G; \mathbb {Z})$. If G$G$ is a one‐ended coherent right‐angled Artin group, we show that the splitting complexity along an epimorphism ϕ:G→Z$\phi \colon G \rightarrow \mathbb {Z}$ equals the L2$L^2$‐Euler characteristic
Monika Kudlinska
wiley   +1 more source

Modified models of a free boson string and their solutions

Қарағанды университетінің хабаршысы. Физика сериясы, 2019
In this paper we consider the modified models of a free boson string and examine their dynamics. Modified models of the boson string are investigated from the point of view of the second order formalism (the Polyakov action).
З.К. Шанина, О.В. Разина
doaj   +1 more source

The Hasse-Minkowski Theorem

, 2006
The Hasse-Minkowski theorem concerns the classification of quadratic forms over global fields (i.e., finite extensions of Q and rational function fields with a finite constant field). Hasse proved the theorem over the rational numbers in his Ph.D. thesis
Gamzon, Adam
core  

Investigation of the Bell-CHSH inequality in diamond regions

European Physical Journal C: Particles and Fields
A numerical setup for the Bell-CHSH inequality for causal diamonds in $$1+1$$ 1 + 1 Minkowski spacetime is presented. Upon choosing a suitable set of test functions supported in the diamonds, sensible violations are reported for the correlation function ...
M. S. Guimaraes, I. Roditi, S. P. Sorella   +2 more
doaj   +1 more source

3D structural analysis: sensitivity of Minkowski functionals

Journal of Microscopy, 2010
SummaryThe Minkowski functionals, a family of statistical measures based on the Euler–Poincaré characteristic of n‐dimensional space, are the complete set of additive morphological measures and can be simply calculated from local contributions. As such, they have found a wide range of applications.
Arns, Christoph, Knackstedt, Mark, Mecke, Klaus   +2 more
openaire   +3 more sources

Asymptotic symmetries and Weinberg’s soft photon theorem in Mink d+2

Journal of High Energy Physics, 2019
We show that Weinberg’s leading soft photon theorem in massless abelian gauge theories implies the existence of an infinite-dimensional large gauge symmetry which acts non-trivially on the null boundaries ± of (d + 2)-dimensional Minkowski spacetime ...
Temple He, Prahar Mitra
doaj   +1 more source

PHYSICAL PROPERTIES OF A CLASS OF SPHERICALLY SYMMETRIC PERFECT FLUID DISTRIBUTIONS IN NONCOMOVING COORDINATES

Odessa Astronomical Publications, 2017
The physical properties of an exact solution of Einstein's field equations are examined. This spherically symmetric perfect fluid solution contains expansion, acceleration and shear. There exist models with regions of spacetime where the pressure and the
H. Knutsen
doaj   +1 more source