Results 31 to 40 of about 300,548 (279)

Hyperbolic string vertices

Journal of High Energy Physics, 2022
The string vertices of closed string field theory are subsets of the moduli spaces of punctured Riemann surfaces that satisfy a geometric version of the Batalin-Vilkovisky master equation.
Kevin Costello, Barton Zwiebach
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An intrinsic construction of Fefferman’s CR metric [PDF]

Pacific Journal of Mathematics, 1986
Let M be a strictly pseudoconvex CR manifold, K be the line bundle of the \((n+1,0)\)-forms on M and let \(C=K/R^+\). Assuming K has a closed section, the author constructs intrinsically a conformal class of Lorentz metrics on the circle bundle C. In the case when the CR structure is that of a hypersurface in \({\mathbb{C}}^{n+1}\), this construction ...
openaire   +3 more sources

Evaluation methodologies in Automatic Question Generation 2013-2018 [PDF]

, 2018
In the last few years Automatic Question Generation (AQG) has attracted increasing interest. In this paper we survey the evaluation methodologies used in AQG.
Amidei, Jacopo, Piwek, Paul, Willis, Alistair   +2 more
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Aberrant Intrinsic Activity and Connectivity in Cognitively Normal Parkinson’s Disease

Frontiers in Aging Neuroscience, 2017
Disturbances in intrinsic activity during resting-state functional MRI (rsfMRI) are common in Parkinson’s disease (PD), but have largely been studied in a priori defined subnetworks.
Deborah L. Harrington, Deborah L. Harrington, Qian Shen, Qian Shen, Gabriel N. Castillo, Gabriel N. Castillo, J. Vincent Filoteo, J. Vincent Filoteo, Irene Litvan, Colleen Takahashi, Chelsea French   +10 more
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Learning Word Embeddings from the Portuguese Twitter Stream: A Study of some Practical Aspects

, 2017
This paper describes a preliminary study for producing and distributing a large-scale database of embeddings from the Portuguese Twitter stream. We start by experimenting with a relatively small sample and focusing on three challenges: volume of training
Oliveira, Eugénio, Rodrigues, Eduarda Mendes, Saleiro, Pedro, Sarmento, Luís, Soares, Carlos   +4 more
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Surface Simplification using Intrinsic Error Metrics

ACM Transactions on Graphics, 2023
This paper describes a method for fast simplification of surface meshes. Whereas past methods focus on visual appearance, our goal is to solve equations on the surface. Hence, rather than approximate the extrinsic geometry, we construct a coarse intrinsic triangulation of the input domain. In the spirit of the
Hsueh-Ti Derek Liu, Mark Gillespie, Benjamin Chislett, Nicholas Sharp, Alec Jacobson, Keenan Crane   +5 more
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Concerning the existence of Einstein and Ricci soliton metrics on solvable Lie groups

, 2010
In this work we investigate solvable and nilpotent Lie groups with special metrics. The metrics of interest are left-invariant Einstein and algebraic Ricci soliton metrics.
Alekseevskiĭ, Besse, Birkes, Eberlein, Eberlein, Jablonski, Jablonski, Jensen, Kempf, Kirwan, Lauret, Marian, Michael Jablonski, Mostow, Mostow, Whitney   +15 more
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Dynamic brain activity states of memory impairment in stroke patients with varying motor outcomes

Frontiers in Aging Neuroscience, 2023
IntroductionThe objective of this study was to characterize the alteration patterns of dynamic spatiotemporal activity in chronic subcortical stroke patients with varying motor outcomes, while investigating the imaging indicators relevant to the ...
Caihong Wang, Caihong Wang, Caihong Wang, Jingchun Liu, Jun Guo, Shaoqiang Han, Shaoqiang Han, Shaoqiang Han, Peifang Miao, Peifang Miao, Peifang Miao, Ying Wei, Ying Wei, Ying Wei, Yingying Wang, Yingying Wang, Yingying Wang, Xin Wang, Xin Wang, Xin Wang, Zhen Li, Kangkang Xue, Kangkang Xue, Kangkang Xue, Kaiyu Wang, Jingliang Cheng, Jingliang Cheng, Jingliang Cheng   +27 more
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Invariant classification and the generalised invariant formalism: conformally flat pure radiation metrics, with zero cosmological constant

, 2010
Metrics obtained by integrating within the generalised invariant formalism are structured around their intrinsic coordinates, and this considerably simplifies their invariant classification and symmetry analysis. We illustrate this by presenting a simple
A. Barnes, A. Held, A. Held, A. Karlhede, A. Karlhede, A. Koutras, A. Koutras, A. Koutras, C.H. Brans, D. Pollney, E. Cartan, E. Newman, G. Ludwig, G. Ludwig, G.O. Papadopoulos, H. Stephani, I. Ozsváth, J. Collins, J. Collins, J. Collins, J. Podolský, J. Podolský, J.E.F. Skea, M. P. Machado Ramos, M.A.H. MacCallum, M.P. Machado Ramos, M.P. Machado Ramos, M.P. Machado Ramos, M.P. Machado Ramos, M.P. Machado Ramos, Michael Bradley, P. Wils, R. Geroch, R. Milson, S. Brian Edgar, S.B. Edgar, S.B. Edgar, S.B. Edgar, S.B. Edgar, S.B. Edgar, S.B. Edgar, S.B. Edgar, S.B. Edgar, W. Kundt, W. Kundt   +44 more
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Singularities of plane complex curves and limits of Kähler metrics with cone singularities. I: Tangent Cones

Complex Manifolds, 2017
The goal of this article is to provide a construction and classification, in the case of two complex dimensions, of the possible tangent cones at points of limit spaces of non-collapsed sequences of Kähler-Einstein metrics with cone singularities.
Borbon Martin de
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