Results 31 to 40 of about 300,939 (289)
On the Timelike Circular Surface and Singularities in Minkowski 3-Space
Axioms, 2023 In this paper, we have parameterized a timelike (Tlike) circular surface (CIsurface) and have obtained its geometric properties, including striction curves, singularities, Gaussian and mean curvatures.
Areej A. Almoneef, Rashad A. Abdel-Baky
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Singularity bifurcations [PDF]
Journal of Macroeconomics, 2006 equation models represent an important class of macroeconomic systems. Our ongoing research (He and Barnett (2003)) on the Leeper and Sims (1994) Euler equations macroeconometric model is revealing the existence of singularity-induced bifurcations, when the model¡¯s parameters are within a confidence region about the parameter estimates. Although known
Yijun He, William Barnett
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Probing graphene’s nonlocality with singular metasurfaces
Nanophotonics, 2020 Singular graphene metasurfaces, conductivity gratings realized by periodically suppressing the local doping level of a graphene sheet, were recently proposed to efficiently harvest THz light and couple it to surface plasmons over broad absorption bands ...
Galiffi Emanuele +4 more
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Evolutoids and pedaloids of frontals on timelike surfaces
Open Mathematics, 2023 In this article, we define evolutoids and pedaloids of frontals on timelike surfaces in Minkowski 3-space. The evolutoids of frontals on timelike surfaces are not only the generalization of evolutoids of curves in the Minkowski plane but also the ...
Wang Yongqiao +3 more
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Superisolated Surface Singularities [PDF]
, 2005 In this survey, we review part of the theory of superisolated surface singularities (SIS) and its applications including some new and recent developments.
Bartolo, E. Artal +2 more
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Exotic singularities and spatially curved Loop Quantum Cosmology [PDF]
, 2010 We investigate the occurrence of various exotic spacelike singularities in the past and the future evolution of $k = \pm 1$ Friedmann-Robertson-Walker model and loop quantum cosmology using a sufficiently general phenomenological model for the equation ...
Francesca Vidotto +2 more
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Singular Propositions and Singular Thoughts
Notre Dame Journal of Formal Logic, 1998 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Relative singularity categories and singular equivalences [PDF]
Journal of Homotopy and Related Structures, 2021 Let $R$ be a right notherian ring. We introduce the concept of relative singularity category $ _{\mathcal{X}}(R)$ of $R$ with respect to a contravariantly finite subcategory $\mathcal{X}$ of $\rm{mod}\mbox{-}R.$ Along with some finiteness conditions on $\mathcal{X}$, we prove that $ _{\mathcal{X}}(R)$ is triangle equivalent to a subcategory of the ...
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Quantum Black Holes and (Re)Solution of the Singularity
Universe, 2021 Classical general relativity predicts the occurrence of spacetime singularities under very general conditions. Starting from the idea that the spacetime geometry must be described by suitable states in the complete quantum theory of matter and gravity ...
Roberto Casadio
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Symplectic $T_7$, $T_8$ singularities and Lagrangian tangency orders
, 2011 We study the local symplectic algebra of curves. We use the method of algebraic restrictions to classify symplectic $T_7$ singularities. We define discrete symplectic invariants - the Lagrangian tangency orders.
Arnold +6 more
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