Results 41 to 50 of about 185,528 (178)

Recursion relations for multi-gluon off-shell amplitudes on the light-front and Wilson lines

open access: yesNuclear Physics B, 2015
We analyze the off-shell scattering amplitudes in the framework of the light-front perturbation theory. It is shown that the previously derived recursion relation between tree level off-shell amplitudes in this formalism actually resums whole classes of ...
C. Cruz-Santiago, P. Kotko, A.M. Staśto
doaj   +1 more source

Polynomial Bounds for Invariant Functions Separating Orbits [PDF]

open access: yes, 2010
Consider the representations of an algebraic group G. In general, polynomial invariant functions may fail to separate orbits. The invariant subring may not be finitely generated, or the number and complexity of the generators may grow rapidly with the ...
Kadish, Harlan
core  

Droplet-shaped waves: Causal finite-support analogs of X-shaped waves

open access: yes, 2013
A model of steady-state X-shaped wave generation by a superluminal (supersonic) pointlike source infinitely moving along a straight line is extended to a more realistic causal scenario of a source pulse launched at time zero and propagating rectilinearly
Abdollahpour   +29 more
core   +1 more source

A Theoretical Basis for Entropy-Scaling Effects in Human Mobility Patterns. [PDF]

open access: yesPLoS ONE, 2016
Characterizing how people move through space has been an important component of many disciplines. With the advent of automated data collection through GPS and other location sensing systems, researchers have the opportunity to examine human mobility at ...
Nathaniel D Osgood   +3 more
doaj   +1 more source

Darboux integrability of a cubic differential system with two parallel invariant straight lines [PDF]

open access: yesCarpathian Journal of Mathematics, 2021
In this paper we prove the Darboux integrability of a cubic differential system with a singular point of a center typer having at least two parallel invariant straight lines.
openaire   +1 more source

Scene Wireframes Sketching for Drones

open access: yesProceedings, 2018
The increasing use of autonomous UAVs inside buildings and around human-made structures demands new accurate and comprehensive representation of their operation environments.
Roi Santos   +2 more
doaj   +1 more source

Uniqueness of Limit Cycles for a Class of CubicSystems with Two Invariant Straight Lines [PDF]

open access: yesDiscrete Dynamics in Nature and Society, 2010
A class of cubic systems with two invariant straight lines dx/dt = y(1 − x2),   dy/dt = −x + δy + nx2 + mxy + ly2 + bxy2. is studied. It is obtained that the focal quantities of O(0, 0) are, W0 = δ; if W0 = 0, then W1 = m(n + l); if W0 = W1 = 0, then W2 = −nm(b + 1); if W0 = W1 = W2 = 0, then O is a center, and it has been proved that the above ...
Xiangdong Xie, Fengde Chen, Qingyi Zhan
openaire   +3 more sources

A PRELIMINARY WORK ON LAYOUT SLAM FOR RECONSTRUCTION OF INDOOR CORRIDOR ENVIRONMENTS [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
We propose a real time indoor corridor layout estimation method based on visual Simultaneous Localization and Mapping (SLAM). The proposed method adopts the Manhattan World Assumption at indoor spaces and uses the detected single image straight line ...
A. Baligh Jahromi   +3 more
doaj   +1 more source

Maximal multiplicity of the line at infinity in a sextic polynomial differential system

open access: yesActa et Commentationes: Ştiinţe Exacte şi ale Naturii
We investigate planar polynomial differential systems of degree six having an invariant straight line at infinity with high algebraic multiplicity in the sense of the Poincaré compactification.
Vadim Repeșco
doaj   +1 more source

Discovery of Power-Law Growth in the Self-Renewal of Heterogeneous Glioma Stem Cell Populations. [PDF]

open access: yesPLoS ONE, 2015
Accumulating evidence indicates that cancer stem cells (CSCs) drive tumorigenesis. This suggests that CSCs should make ideal therapeutic targets. However, because CSC populations in tumors appear heterogeneous, it remains unclear how CSCs might be ...
Michiya Sugimori   +12 more
doaj   +1 more source

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