Results 21 to 30 of about 625,134 (279)
Hirzebruch's conjecture on cusp singularities
Mathematische Annalen, 1993 This paper relates the signature defect \(\sigma (p)\) of an \(n\)- dimensional cusp singularity \((V,p)\) to \(\chi_ \infty (p)\), the contribution of the cusp to the arithmetic genus: \(\sigma (p) = 2^ n \chi_ \infty (p)\). The author gives a formula for the signature \(\text{Sign} (U, \partial U)\) of a neighbourhood \(U\) of the exceptional set of ...
S. Ogata
semanticscholar +2 more sources
Tsuchihashi's cusp singularities and automorphisms of Hilbert modular variety cusps
Mathematische Annalen, 1986 \textit{H. Tsuchihashi} [Tôhoku J. Math., II. Ser. 35, 607--639 (1983; Zbl 0585.14004)] introduced a class of cusp singularities extending the class of Hilbert modular variety cusps. Here, a necessary and sufficient condition for a cusp in this sense to be a Hilbert modular variety cusp is proved. Some cusps occur as finite quotients of Hilbert modular
exaly +3 more sources
Complex Periodic Mixed-Mode Oscillation Patterns in a Filippov System
Mathematics, 2022 The main task of this article is to study the patterns of mixed-mode oscillations and non-smooth behaviors in a Filippov system with external excitation. Different types of periodic spiral crossing mixed-mode oscillation patterns, i.e., “cusp-F−/fold-F−”
Chun Zhang, Qiaoxia Tang
doaj +1 more source
The λ-Point Map between Two Legendre Plane Curves
Mathematics, 2023 The λ-point map between two Legendre plane curves, which is a map from the plane into the plane, is introduced. The singularity of this map is studied through this paper and many known plane map singularities are realized as special cases of this ...
Azeb Alghanemi, Abeer AlGhawazi
doaj +1 more source
Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets
Nuclear Physics B, 2023 We study accretion tori and proto-jets in the field of central Kerr super-spinning attractors, exposing distinctions between Kerr naked singularities (NSs) and black holes (BHs).
D. Pugliese, Z. Stuchlík
doaj +1 more source
Smoothings and rational double point adjacencies for cusp singularities [PDF]
Journal of differential geometry, 2016 A cusp singularity is a surface singularity whose minimal resolution is a cycle of smooth rational curves meeting transversely. Cusp singularities come in naturally dual pairs.
P. Engel, R. Friedman
semanticscholar +1 more source
On the formation of the high-altitude stagnant cusp : Cluster observations [PDF]
, 2005 On 16 March 2002, Cluster moved from nightside to dayside, across the high-altitude northern cusp during an extended period of relatively steady positive IMF BY and BZ. Combined Cluster and SuperDARN data imply the existence of two reconnection sites: in
Rème, H. +11 more
core +5 more sources
Kinematical cusp and resonance interpretations of the X(2900)
Physics Letters B, 2021 We examine whether the LHCb vector udc¯s¯ state X(2900) can be interpreted as a kinematical cusp effect arising from D¯⁎K⁎ and D¯1K(⁎) interactions. The production amplitude is modelled as a triangle diagram with hadronic final state interactions.
T.J. Burns, E.S. Swanson
doaj +1 more source
Mechanism for the formation of the high-altitude stagnant cusp: Cluster and SuperDARN observations [PDF]
, 2006 On 16 March 2002, Cluster moved from nightside to dayside, across the high-altitude northern cusp during an extended period of relatively steady positive IMF BY and BZ. Combined Cluster and SuperDARN data imply the existence of two reconnection sites: in
Wild, J.A. +9 more
core +4 more sources
Equivariant smoothing of cusp singularities [PDF]
We generalize Looijenga\u27s conjecture for smoothing surface cusp singularities to the equivariant setting. Moreover, we prove that for any cusp singularity which admits a one-parameter smoothing, the smoothing can always be induced by smoothing of ...
Jiang, Yunfeng
core +8 more sources