Abstract We study the Chebyshev–Halley methods applied to family of polynomials $$f_{n,c}(z)=z^n+c$$ f n , c ( z ) = +</mml:mo...

We report the statistical detection (at the > 99% confidence level) of a population of 28th magnitude objects exhibiting proper motions of ≈1 arcsecond per hour at quadrature in deep HST/WFPC2 images. The drift directions imply a preponderance of objects on prograde orbits concentrated near the ecliptic plane. We interpret this as the detection of objects which reside in the Kuiper belt near or...

A sharp (<104 km thick) transition from a solar wind proton dominated flow to a plasma population primarily consisting of relatively cold cometary heavy ions has been observed at a cometocentric distance of about 1.6x105 km by the VEGA and GIOTTO missions. This boundary (the cometopause) was thought to be related to charge transfer processes, but its location and thickness are inconsistent with...

In the single band tight-binding approximation, we consider the transport properties of an electron subject to a homogeneous static electric field. We show that repeated interactions of the electron with two-level systems in thermal equilibrium suppress the Bloch oscillations and induce a steady current, the statistical properties of which we study. [email protected] 95000 Cergy-Pontoi...