Results 71 to 80 of about 105,688 (202)

Non-Gaussian Expansion of Minkowski Tensors in Redshift Space

The Astrophysical Journal
This paper focuses on extending the use of Minkowski tensors to analyze anisotropic signals in cosmological data, focusing on those introduced by redshift space distortions.
Stephen Appleby, Christophe Pichon, Pravabati Chingangbam, Dmitri Pogosyan, Changbom Park   +4 more
doaj   +1 more source

Minkowski space approach for the Bethe-Salpeter equation

EPJ Web of Conferences, 2017
The bound-state energy spectrum for two-boson system with a fixed exchanged massive boson is investigated by considering the scalar Bethe-Salpeter (BS) equation in Minkowski space within the ladder-approximation framework.
Tomio Lauro, Gutierrez Cristian, Gigante Vitor   +2 more
doaj   +1 more source

Validation of machine learning based scenario generators

Journal of Risk and Insurance, EarlyView.
Abstract Machine learning (ML) methods are becoming increasingly important for designing economic scenario generators for internal models. Validating data‐driven models requires different methods than validating classical, theory‐based models. We discuss two novel aspects of such validation: first, checking the multivariate distribution of risk factors,
Gero Junike, Solveig Flaig, Ralf Werner
wiley   +1 more source

On a Class of human development index measures [PDF]

Using Minkowski distance function we propose a class of Human Development Index measures. Special cases of this turn out to be the popularly used linear average method as also a newly proposed displaced ideal method. Two measures of penalty are suggested.
Hippu Salk Kristle Nathan, Srijit Mishra
core   +3 more sources

Conformal partial wave expansion of celestial correlators

Journal of High Energy Physics
A novel definition of holographic correlation functions on the celestial sphere of Minkowski space was recently introduced in [1] as the extrapolation of bulk time-ordered correlation functions to the celestial sphere.
Francesca Pacifico, Charlotte Sleight, Massimo Taronna   +2 more
doaj   +1 more source

3D structural analysis: sensitivity of Minkowski functionals

Journal of Microscopy, 2010
SummaryThe Minkowski functionals, a family of statistical measures based on the Euler–Poincaré characteristic of n‐dimensional space, are the complete set of additive morphological measures and can be simply calculated from local contributions. As such, they have found a wide range of applications.
Arns, Christoph, Knackstedt, Mark, Mecke, Klaus   +2 more
openaire   +3 more sources

Some harmonic functions on Minkowski space [PDF]

Proceedings of the American Mathematical Society, 1997
This note presents elementary geometric descriptions of several simple families of harmonic functions on the upper sheet of the unit hyperboloid in Minkowski three-space. As is briefly discussed here, these calculations grew out of an earlier attempt to construct Poincaré series on punctured surfaces using Minkowski geometry.
Glezen, P. F., Penner, R. C.
openaire   +2 more sources

Welfare and Felt Duration

Noûs, EarlyView.
ABSTRACT How should we understand the duration of a pleasant or unpleasant sensation, insofar as its duration modulates how good or bad the experience is overall? Given that we seem able to distinguish between subjective and objective duration and that how well or badly someone's life goes is naturally thought of as something to be assessed from her ...
Andreas L. Mogensen
wiley   +1 more source

Modified celestial amplitude in Einstein gravity

Journal of High Energy Physics, 2020
In this paper we evaluate the modified celestial amplitude for gravitons and gluons, as defined in [4]. We find that the modified (tree) amplitude is finite for gravitons in Einstein gravity.
Shamik Banerjee, Sudip Ghosh, Pranjal Pandey, Arnab Priya Saha   +3 more
doaj   +1 more source

Causal particle detectors and topology

, 2005
We investigate particle detector responses in some topologically non-trivial spacetimes. We extend a recently proposed regularization of the massless scalar field Wightman function in 4-dimensional Minkowski space to arbitrary dimension, to the massive ...
Abramowitz, Allen, Anderson, Banach, Banach, Birrell, Chamblin, Chen, Davies, Davies, Davies, Deser, Deser, Deser, DeWitt, Fewster, Fewster, Fewster, Ford, Ford, Ford, Ford, Fronsdal, Garfinkle, Geroch, Goenner, Gradshteyn, Hawking, Higuchi, Hong, Hong, Hong, Hong, Kim, Langlois, Langlois, Louko, Louko, McInnes, Misner, Paul Langlois, Pfenning, Pfenning, Santos, Schleich, Schleich, Schlicht, Sriramkumar, Sriramkumar, Suzuki, Svaiter, Svaiter, Takagi, Unruh, Vilenkin, Zwillinger   +55 more
core   +2 more sources