Now showing items 1-10 of 148
Dimensions of sets which uniformly avoid arithmetic progressions
(2017-11-02) - Journal article,
We provide estimates for the dimensions of sets in ℝ which uniformly avoid finite arithmetic progressions (APs). More precisely, we say F uniformly avoids APs of length k≥3 if there is an ϵ>0 such that one cannot find an ...
The Paris Observatory appoints a director in 1907
(2018-12-12) - Journal article,
Between primitive and 2-transitive : synchronization and its friends
(2017) - Journal article,
An automaton (consisting of a finite set of states with given transitions) is said to be synchronizing if there is a word in the transitions which sends all states of the automaton to a single state. Research on this topic ...
Uniform scaling limits for ergodic measures
(2017) - Journal article,
We provide an elementary proof that ergodic measures on one-sided shift spaces are ‘uniformly scaling’ in the following sense: at almost every point the scenery distributions weakly converge to a common distribution on the ...
Dimensions of equilibrium measures on a class of planar self-affine sets
(2018-06-11) - Journal article,
We study equilibrium measures (Käenmäki measure) supported on self-affine sets generated by a finite collection of diagonal and anti-diagonal matrices acting on the plane and satisfying the strong separation property. Our ...
Uphill acceleration in a spatially modulated electrostatic field particle accelerator
(2018-11) - Journal article,
Spatially modulated electrostatic fields can be designed to efficiently accelerate particles by exploring the relations between the amplitude, the phase velocity, the shape of the potential and the initial velocity of the ...
Broadening of the differential emission measure by multi-shelled and turbulent loops
(2018-12) - Journal article,
Context. Broad differential emission measure (DEM) distributions in the corona are a sign of multi-thermal plasma along the line-of-sight.Traditionally, this is interpreted as evidence of multi-stranded loops. Recently, ...
Editing Cavendish : Maxwell and The Electrical Researches of Henry Cavendish
(Living Edition/STARNA, 2017) - Conference item,
During the last five years of his life, 1874-79, James Clerk Maxwell was absorbed in editing the electrical researches of Henry Cavendish, performed 100 years earlier. This endeavour is often assumed to be a work of duty ...
Slow and fast escape for open intermittent maps
(2017-04) - Journal article,
If a system mixes too slowly, putting a hole in it can completely destroy the richness of the dynamics. Here we study this instability for a class of intermittent maps with a family of slowly mixing measures. We show that ...
Hitting times and periodicity in random dynamics
(2015-10) - Journal article,
We prove quenched laws of hitting time statistics for random subshifts of finite type. In particular we prove a dichotomy between the law for periodic and for non-periodic points. We show that this applies to random Gibbs ...