Generalized Rybicki Press algorithm

S Ambikasaran - Numerical Linear Algebra with Applications, 2015 - Wiley Online Library
Rybicki Press algorithm, which enables inverting and computing determinants of covariance
matrices, whose elements are sums of exponentials. The algorithm is … banded algorithms for …

A generalization of the Sobolev method for flows with nonlocal radiative coupling

GB Rybicki, DG Hummer - … Journal, Part 1, vol. 219, Jan. 15 …, 1978 - adsabs.harvard.edu
… atmospheres is generalized to treat flows in which the line-of-sight component of the flow …
Equation (100) is the generalization of equation (45). The desired generalization of equation (…

Degenerate bifurcation points of periodic solutions of autonomous Hamiltonian systems

W Radzki, S Rybicki - Journal of Differential Equations, 2004 - Elsevier
We study connected branches of nonconstant 2π-periodic solutions of the Hamilton equation
[Formula: see text] where λ∈(0,+∞), H∈C 2 ( R n × R n , R ) and ∇ 2 H(x 0 )= A 0 0 B for x …

An incremental complementary energy method of nonlinear stress analysis

EF Rybicki, LA SCHMIT JR - AIAA Journal, 1970 - arc.aiaa.org
… The incremental complementary energy approach to stress analysis including material
nonlinearity has been successfully applied to plane stress and generalized plane strain problems…

Bifurcations of Solutions of SO(2)-Symmetric Nonlinear Problems with Variational Structure

S Rybicki - Handbook of Topological Fixed Point Theory, 2005 - Springer
One of the strongest and the most popular tools in topological nonlinear analysis are the
Brouwer topological degree and its infinite-dimensional generalization the Leray–Schauder …

Reconstruction algorithm for novel ultrafast magnetic resonance imaging

FJ Rybicki, S Patz, MI Hrovat… - International journal of …, 1999 - Wiley Online Library
… a reconstruction algorithm. The algorithm is evaluated by assuming a known spin density
which is then used to calculate the PERL signal. This signal is the input for the algorithm. We …

Spectral line formation in variable-property media: The Riccati method

GB Rybicki, DG Hummer - Astrophysical Journal, vol. 150, p …, 1967 - adsabs.harvard.edu
… A numerical method, based on a generalized Riccati transformation of Rybicki and Usher,
is … Most of these numerical solutions were obtained by a generalized discrete-ordinate …

Generalization optimizing machine learning to improve CT scan radiomics and assess immune checkpoint inhibitors' response in non-small cell lung cancer: a …

…, M Orain, N Bouchard, T Muanza, FJ Rybicki… - Frontiers in …, 2023 - frontiersin.org
… a generalization-optimizing AI framework, overcomes these limitations of previous models
that did not generalize and … selection that chooses the best algorithm that identifies features to …

[HTML][HTML] The time delay of gravitational lens 0957+ 561. I-Methodology and analysis of optical photometric data. II-Analysis of radio data and combined optical-radio …

WH Press, GB Rybicki, JN Hewitt - … 0004-637X), vol. 385, Feb. 1 …, 1992 - adsabs.harvard.edu
… [8]) as well as individual errors (n~), then the generalization ofequation (13) is … so such
a generalization is essential to the present application. … (13) The generalization to the …

On the fast Fourier transform of functions with singularities

G Beylkin - Applied and Computational Harmonic Analysis, 1995 - Elsevier
… of generalized functions and develop a fast algorithm based on its evaluation. In particular,
we construct an algorithm … In [11] Press and Rybicki suggest using Lagrange interpolation to …