Results 11 to 20 of about 124,243 (153)
The canonical pencils on Horikawa surfaces [PDF]
, 2006 We calculate the monodromies of the canonical Lefschetz pencils on a pair of homeomorphic Horikawa surfaces. We show in particular that the (pluri)canonical pencils on these surfaces have the same monodromy groups, and are related by a "partial twisting"
Auroux +20 more
core +4 more sources
Feature Extraction of Gearbox Early Fault based on ISGMD and MED
Jixie chuandong, 2022 Aiming at the difficulty in identifying early faults and compound faults of gearboxes under strong noise background，a method of extracting fault features based on the combination of improved symplectic geometry mode decomposition （ISGMD） and minimum ...
Shuzhou Dong, Xunpeng Qin, Shiming Yang
doaj
Symplectic Geometry and Its Applications on Time Series Analysis
Structure Topology and Symplectic Geometry, 2020 This chapter serves to introduce the symplectic geometry theory in time series analysis and its applications in various fields. The basic concepts and basic elements of mathematics relevant to the symplectic geometry are introduced in the second section.
Min Lei
semanticscholar +1 more source
The Symplectic Penrose Kite [PDF]
, 2010 The purpose of this article is to view the Penrose kite from the perspective of symplectic geometry.Comment: 24 pages, 7 figures, minor changes in last version, to appear in Comm.
D. Shechtman +12 more
core +2 more sources
The Gromov width of complex Grassmannians [PDF]
, 2005 We show that the Gromov width of the Grassmannian of complex k-planes in C^n is equal to one when the symplectic form is normalized so that it generates the integral cohomology in degree 2. We deduce the lower bound from more general results. For example,
Biran +7 more
core +3 more sources
Symmetry and Conservation Laws in Semiclassical Wave Packet Dynamics [PDF]
, 2015 We formulate symmetries in semiclassical Gaussian wave packet dynamics and find the corresponding conserved quantities, particularly the semiclassical angular momentum, via Noether's theorem.
Ohsawa, Tomoki
core +1 more source
On the geometry of the Lehn–Lehn–Sorger–van Straten eightfold [PDF]
, 2017 In this note we make a few remarks about the geometry of the holomorphic symplectic manifold Z constructed in [LLSvS] as a two-step contraction of the variety of twisted cubic curves on a cubic fourfold Y ⊂ P.
Evgeny Shinder, A. Soldatenkov
semanticscholar +2 more sources
RESEARCH ON ROLLING BEARING FAULT FEATURE EXTRACTION METHOD WITH SGMD-MOMEDA (MT)
Jixie qiangdu, 2022 Aiming at the problem that the vibration signal of rolling bearing is difficult to extract due to the characteristics of non-linear, non-stationary and low signal-to-noise ratio, a new fault extraction method based on symplectic geometry mode ...
CAO YaLei +5 more
doaj
Homotopy K3's with several symplectic structures
, 2001 In this note we prove that, for any integer n, there exist a smooth 4-manifold, homotopic to a K3 surface, defined by applying the link surgery method of Fintushel-Stern to a certain 2-component graph link, which admits n inequivalent symplectic ...
Eisenbud +5 more
core +3 more sources
Prequantization of the Moduli Space of Flat ${\rm PU}(p)$-Bundles with Prescribed Boundary Holonomies [PDF]
, 2014 Using the framework of quasi-Hamiltonian actions, we compute the obstruction to prequantization for the moduli space of flat ${\rm PU}(p)$-bundles over a compact orientable surface with prescribed holonomies around boundary components, where $p>2$ is ...
Krepski, Derek
core +4 more sources