Results 21 to 30 of about 290 (118)
Homothety Curvature Homogeneity
, 2013 We examine the difference between several notions of curvature homogeneity and show that the notions introduced by Kowalski and Vanžurová are genuine generalizations of the ordinary notion of $k$-curvature homogeneity. The homothety group plays an essential role in the analysis.
García-Río, E. +2 more
openaire +2 more sources
Stability numbers in K-contact manifolds [PDF]
, 2008 The aim of this paper is to study the stability of the characteristic vector field of a compact K-contact manifold with respect to the energy and volume functionals when we consider on the manifold a two-parameter variation of the metric.
Ana Hurtado, Hurtado, Ana
core +1 more source
Homotheties of Finsler manifolds
Homotheties of Finsler manifoldsSzilasi, József, Lovas, Rezsö L.
openaire +2 more sources
Homothetic Invariance of the Space L0(μ) [PDF]
, 1993 We study the space L0(μ) of μ-measurable real or complex-valued functions which vanish outside a set of finite measure, equipped with the group-norm given by ||ƒ||0 = μ{ω|ƒ(ω) ≠ 0}. Attention is focussed on the invariance of || ||0 under homotheties.
Alvarez, S.A.
core +1 more source
Homothéties explicites des représentations ℓ-adiques
, 2023 This article presents and specifies the main known results on the size of the subgroup of homotheties of l-adic representations associated with the torsion of an abelian variety.
Galateau, Aurélien, Martínez, César
core +1 more source
Optimal bounds for the Kobayashi distance near C2$\mathcal {C}^2$‐smooth boundary points
Journal of the London Mathematical Society, Volume 114, Issue 4, October 2026.Abstract It is shown that the optimal upper and lower bounds for the Kobayashi distance near C2,α$\mathcal {C}^{2,\alpha }$‐smooth strongly pseudoconvex boundary points obtained in Kosiński, Nikolov, and Ökten [Adv. Math. 478 (2025), 110388] remain true in the general C2$\mathcal {C}^2$‐smooth strongly pseudoconvex setting.
Nikolai Nikolov, Pascal J. Thomas
wiley +1 more source
Modular analogs of character formulas and minimal lifts of modular forms
Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.Abstract If f$f$ is a mod‐3 eigenform of weight 2 and level Γ0(ℓ2)$\Gamma _0(\ell ^2)$ for a prime ℓ$\ell$ such that ℓ≡−1(mod3)$\ell \equiv -1 \pmod {3}$, and ℓ$\ell$ is a vexing prime for f$f$, we show that there is no obstruction to finding a minimal lift of f$f$, but that there is an obstruction to finding a nonminimal lift.
Patrick B. Allen, Preston Wake
wiley +1 more source
Homotheties of cylindrically symmetric static manifolds and their global extension [PDF]
Classical and Quantum Gravity, 1999 Cylindrically symmetric static manifolds are classified according to their homotheties and metrics. In each case the homothety vector fields and the corresponding metrics are obtained explicitly by solving the homothety equations. It turns out that these metrics admit homothety groups $H_m$, where $m=4,5,7,11$.
Qadir, Asghar, Sharif, M., Ziad, M.
openaire +2 more sources
Isometric immersions into three‐dimensional unimodular metric Lie groups
Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.Abstract We study isometric immersions of surfaces into simply connected three‐dimensional unimodular Lie groups endowed with either Riemannian or Lorentzian left‐invariant metrics, assuming that Milnor's operator is diagonalizable in the Lorentzian case.
Ildefonso Castro +2 more
wiley +1 more source
On Making Informed Decisions Regarding Clustering Event Logs in Process Discovery
Expert Systems, Volume 43, Issue 8, August 2026.ABSTRACT Process discovery is intended to machine‐learn process models by analysing event logs that record how real processes work. The resulting models tend to be complex because they must account for all the variability in the event logs. It is agreed that clustering the input event log prior to discovery may result in better models.
Belén Ramos‐Gutiérrez +5 more
wiley +1 more source