Results 21 to 30 of about 2,019,254 (295)
Polynomial effective equidistribution
Comptes Rendus. Mathématique, 2023 We prove effective equidistribution theorems, with polynomial error rate, for orbits of the unipotent subgroups of $\mathrm{SL}_2(\mathfrak{l})$ in arithmetic quotients of $\mathrm{SL}_2(\mathbb{C})$ and $\mathrm{SL}_2(\mathfrak{l})\times \mathrm{SL}_2 ...
Lindenstrauss, Elon +2 more
doaj +1 more source
The Journal of Engineering, 2019 To realise wide-band stealth of radar absorbing material, a special-shaped honeycomb radar absorbing structure within nested cone-shaped scattering configuration is designed.
Wang Ming-liang +9 more
doaj +1 more source
Convex subspaces of Lie incidence geometries
Combinatorial Theory, 2022 Let \(\Gamma\) be a hexagonic Lie incidence structure, e.g.\ a long root geometry of a (thick irreducible) spherical Tits building; compare \textit{E. E. Shult} [Points and lines. Characterizing the classical geometries. Berlin: Springer (2011; Zbl 1213.51001)]. The authors classify all convex subspaces of \(\Gamma\) under the assumption that \(\Gamma\)
Meulewaeter, Jeroen +1 more
openaire +5 more sources
Double Sided Band-pass Frequency Selective Surface Based on Matryoshka Geometry [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsThis paper describes the development of a double-sided band-pass frequency selective surface based on Matryoshka geometry, preserving features such as miniaturization, multiband operation and stability of polarization and angle of incidence.
Marina de O. Alencar +3 more
doaj +1 more source
Aerospace, 2023 Studies on the geometry variation-related compressor uncertainty quantification (UQ) have often used dimension reduction methods, such as the principal component analysis (PCA), for the modeling of deviations.
Mingzhi Li +4 more
doaj +1 more source
Factorizations in Geometric Lattices
AxiomsThis article investigates atomic decompositions in geometric lattices isomorphic to the partition lattice Π(X) of finite set X, a fundamental structure in lattice theory and combinatorics.
Alex Aguila +2 more
doaj +1 more source
An Incidence Geometry approach to Dictionary Learning
CoRR, 2014 We study the Dictionary Learning (aka Sparse Coding) problem of obtaining a sparse representation of data points, by learning \emph{dictionary vectors} upon which the data points can be written as sparse linear combinations. We view this problem from a geometry perspective as the spanning set of a subspace arrangement, and focus on understanding the ...
Meera Sitharam +2 more
openaire +4 more sources
Central Conics in
GeometryWe provide an intrinsic construction of the central conics in the real hyperbolic plane H2, whereby each conic C is the composition of a unique pair of Steiner conics (those generated by collineations).
John Sarli
doaj +1 more source
Remote SensingThis study investigates the use of terrestrial laser scanning (TLS) in urban excavation sites, focusing on enhancing ground deformation detection by precisely identifying opening geometries, such as gaps between pavement blocks. The accuracy of TLS data,
Jinman Jung +4 more
doaj +1 more source
Incidence geometry in a Weyl chamber II: SL
Advances in Applied Mathematics, 2020 We study the central hyperplane arrangement whose hyperplanes are the vanishing loci of the weights of the first and the second fundamental representations of $\mathfrak{gl}_n$ restricted to the dual fundamental Weyl chamber. We obtain generating functions that count flats and faces of a given dimension.
Mboyo Esole +3 more
openaire +9 more sources