Results 21 to 30 of about 38,455 (230)
A FEAST Algorithm for the Linear Response Eigenvalue Problem
Algorithms, 2019 In the linear response eigenvalue problem arising from quantum chemistry and physics, one needs to compute several positive eigenvalues together with the corresponding eigenvectors.
Zhongming Teng, Linzhang Lu
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Numerical contour integration for loop integrals [PDF]
Computer Physics Communications, 2006 A fully numerical method to calculate loop integrals, a numerical contour-integration method, is proposed. Loop integrals can be interpreted as a contour integral in a complex plane for an integrand with multi-poles in the plane. Stable and efficient numerical integrations an along appropriate contour can be performed for tensor integrals as well as ...
Kurihara, Y., Kaneko, T.
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Targeting multi-loop integrals with neural networks
SciPost Physics, 2022 Numerical evaluations of Feynman integrals often proceed via a deformation of the integration contour into the complex plane. While valid contours are easy to construct, the numerical precision for a multi-loop integral can depend critically on the ...
Ramon Winterhalder, Vitaly Magerya, Emilio Villa, Stephen P. Jones, Matthias Kerner, Anja Butter, Gudrun Heinrich, Tilman Plehn
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RPExpand: Software for Riesz projection expansion of resonance phenomena
SoftwareX, 2021 We present the software RPExpand for modal expansions of physical observables in resonant systems. The software is implemented in MATLAB® and uses Riesz projections to compute the expansion terms.
Fridtjof Betz +2 more
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Numerical Contour Integration [PDF]
The Mathematica Journal, 2021 We present a straightforward implementation of contour integration by setting options for Integrate and NIntegrate, taking advantage of powerful results in complex analysis. As such, this article can be viewed as documentation to perform numerical contour integration with the existing built-in tools.
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Asymptotic Expansions for Large Degree Tangent and Apostol-Tangent Polynomials of Complex Order
Journal of Applied Mathematics, 2023 This paper provides asymptotic expansions for large values of n of tangent Tnμz and Apostol-tangent Tnμz;λ polynomials of complex order. The derivation is done using contour integration with the contour avoiding branch cuts.
Cristina B. Corcino +2 more
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Low level constraints on dynamic contour path integration. [PDF]
PLoS ONE, 2014 Contour integration is a fundamental visual process. The constraints on integrating discrete contour elements and the associated neural mechanisms have typically been investigated using static contour paths.
Sophie Hall, Patrick Bourke, Kun Guo
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CONSISTENCY MATCHING IN THE INTEGRATION OF CONTOUR AND RIVER DATA BY SPATIAL KNOWLEDGE [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 As the representation of terrain surface and height information, the contour data has the strict constraint relationship with the distribution of river network.
T. Ai, M. Yang
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Brightness/darkness induction and the genesis of a contour
Frontiers in Human Neuroscience, 2014 Visual contours often result from the integration or interpolation of fragmented edges.The strength of the completion increases when the edges share the same contrast polarity (CP).
Sergio eRoncato
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DIGITAL ELEVATION MODEL INTERPOLATION BY FUSION OF MORPHOLOGICAL RECONSTRUCTION AND DISTANCE TRANSFORMATION [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 Interpolation methods have significant impacts on the accuracy of the digital elevation model (DEM) from contours which are one of frequently employed data sources.
J. Shen +4 more
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