2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR75 papers
- University of MünsterDE37 papers
- Los Alamos National LaboratoryUS33 papers
- Max Planck Institute for Dynamics and Self-OrganizationDE26 papers
- Observatoire de la Côte d’AzurFR26 papers
- University of StuttgartDE25 papers
- Friedrich-Alexander-Universität Erlangen-NürnbergDE23 papers
- Heinrich Heine University DüsseldorfDE23 papers
- Northwestern UniversityUS23 papers
- Deutsches Elektronen-Synchrotron DESYDE22 papers
- Bogolyubov Institute for Theoretical PhysicsUA21 papers
- ETH ZurichCH21 papers
50 papers · 1 filter
Monte Carlo computer simulations and electron microscopy of colloidal cluster formation via emulsion droplet evaporation
Ingmar Schwarz, Andrea Fortini, Claudia Simone Wagner +2
We consider a theoretical model for a binary mixture of colloidal particles and spherical emulsion droplets. The hard sphere colloids interact via additional short-ranged attractio…
On -roughly weighted games
Josep Freixas, Sascha Kurz
Gvozdeva, Hemaspaandra, and Slinko (2011) have introduced three hierarchies for simple games in order to measure the distance of a given simple game to the class of (roughly) weigh…
Forced Nonlinear Schroedinger Equation with Arbitrary Nonlinearity
Fred Cooper, Avinash Khare, Niurka R. Quintero +2
We consider the nonlinear Schr{ö}dinger equation (NLSE) in 1+1 dimension with scalar-scalar self interaction in the presence of the external for…
Erdős-Szekeres and Testing Weak epsilon-Nets are NP-hard in 3 dimensions - and what now?
Christian Knauer, Daniel Werner
We consider the computational versions of the Erd\H os-Szekeres theorem and related problems in 3 dimensions. We show that, in constrast to the planar case, no polynomial time algo…
On the stability of bootstrap estimators
Andreas Christmann, Matias Salibian-Barrera, Stefan Van Aelst
It is shown that bootstrap approximations of an estimator which is based on a continuous operator from the set of Borel probability measures defined on a compact metric space into…
Estimation of scale functions to model heteroscedasticity by support vector machines
Robert Hable, Andreas Christmann
A main goal of regression is to derive statistical conclusions on the conditional distribution of the output variable Y given the input values x. Two of the most important characte…
On the order three Brauer classes for cubic surfaces
Andreas-Stephan Elsenhans, Jörg Jahnel
We describe a method to compute the Brauer-Manin obstruction for smooth cubic surfaces over such that $\Br(S)/\Br(\bbQ)$ is a 3-group. Our approach is to associate a Brauer…
On the dynamics of vortex modes within magnetic islands
William Hornsby, Arthur Peeters, Mattia Siccinio +1
Recent work investigating the interaction of magnetic islands with micro-turbulence has uncovered the striking observation of large scale vortex modes forming within the island str…
Pseudo-Automorphisms of positive entropy on the blowups of products of projective spaces
Fabio Perroni, De-Qi Zhang
We use a concise method to construct pseudo-automorphisms f_n of the first dynamical degree d_1(f_n) > 1 on the blowups of the projective n-space for all n > 1 and more generally o…
Statics and dynamics of inhomogeneous liquids via the internal-energy functional
Matthias Schmidt
We give a variational formulation of classical statistical mechanics where the one-body density and the local entropy distribution constitute the trial fields. Using Levy's constra…
Spherical sample holders to improve the susceptibility measurement of superparamagnetic materials
Thomas Friedrich, Tobias Lang, Ingo Rehberg +1
The design of two custom sample holders with a spherical cavity for commercial vibrating sample magnetometer systems is described. For such cavities the magnetization M and the int…
Extended Ginzburg-Landau formalism: systematic expansion in small deviation from the critical temperature
A. V. Vagov, A. A. Shanenko, M. V. Milošević +2
Based on the Gor'kov formalism for a clean s-wave superconductor, we develop an extended version of the single-band Ginzburg-Landau (GL) theory by means of a systematic expansion i…
Density functional for ternary non-additive hard sphere mixtures
Matthias Schmidt
Based on fundamental measure theory, a Helmholtz free energy density functional for three-component mixtures of hard spheres with general, non-additive interaction distances is con…
Kummer surfaces and the computation of the Picard group
Andreas-Stephan Elsenhans, Jörg Jahnel
We test R. van Luijk's method for computing the Picard group of a surface. The examples considered are the resolutions of Kummer quartics in $\bP^3$. Using the theory of abeli…
Observation of Density Segregation inside Migrating Dunes
Christopher Groh, Ingo Rehberg, Christof A. Kruelle
Spatiotemporal patterns in nature, such as ripples or dunes, formed by a fluid streaming over a sandy surface show complex behavior despite their simple forms. Below the surface, t…
Explicit Selmer groups for cyclic covers of P^1
Michael Stoll, Ronald van Luijk
For any abelian variety J over a global field k and an isogeny phi: J -> J, the Selmer group Sel^phi(J,k) is a subgroup of the Galois cohomology group H^1(Gal(ksep/k), J[phi]), def…
Microscopic and macroscopic theories for the dynamics of polar liquid crystals
Raphael Wittkowski, Hartmut Löwen, Helmut R. Brand
We derive and analyze the dynamic equations for polar liquid crystals in two spatial dimensions in the framework of classical dynamical density functional theory (DDFT). Translatio…
Period tripling causes rotating spirals in agitated wet granular layers
Kai Huang, Ingo Rehberg
Pattern formation of a thin layer of vertically agitated wet granular matter is investigated experimentally. Rotating spirals with three arms, which correspond to the kinks between…
Annealing of single lamella nanoparticles of polyethylene
Christophe N. Rochette, Sabine Rosenfeldt, Katja Henzler +7
We study the change of the size and structure of freely suspended single lamella nanoparticles of polyethylene during thermal annealing in aqueous solutions. Using small-angle x-ra…
Explicit n-descent on elliptic curves. III. Algorithms
John Cremona, Tom Fisher, Cathy O'Neil +2
This is the third in a series of papers in which we study the n-Selmer group of an elliptic curve, with the aim of representing its elements as curves of degree n in P^{n-1}. The m…
A refined empirical stability criterion for nonlinear Schroedinger solitons under spatiotemporal forcing
Franz G. Mertens, Niurka R. Quintero, I. V. Barashenkov +1
We investigate the dynamics of travelling oscillating solitons of the cubic NLS equation under an external spatiotemporal forcing of the form . For the cas…
On cubic surfaces with a rational line
Andreas-Stephan Elsenhans, Jörg Jahnel
We report on our project to construct non-singular cubic surfaces over with a rational line. Our method is to start with degree 4 Del Pezzo surfaces in diagonal form. For th…
A note on the magnetic spatial forcing of a ferrofluid layer
Thomas Friedrich, Adrian Lange, Ingo Rehberg +1
We report on the response of a thin layer of ferrofluid to a spatially modulated magnetic field. This field is generated by means of a constant current in a special arrangement of…
On the characteristic polynomial of the Frobenius on étale cohomology
Andreas-Stephan Elsenhans, Jörg Jahnel
Let be a smooth proper variety of even dimension over a finite field. We establish a restriction on the value at of the characteristic polynomial of the Frobenius on…