Spglib: a software library for crystal symmetry search
August 5, 2018
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Physics
Materials Science
A computer algorithm to search symmetries of crystal structures as
implemented in the \texttt{spglib} code is described. An iterative algorithm is
employed to robustly identify space group types tolerating a certain amount of
distortion in ...
Relation between particle beam eigen-emittances and canonical vorticity
flux
August 2, 2018
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Physics
Accelerator Physics
Plasma Physics
Accelerator Physics
Plasma Physics
Particle beams provided by accelerators occupy a finite volume of the four
dimensional transverse phase space. The latter is spanned by the four degrees
of freedom, i.e., horizontal/vertical position and momentum. This volume is
referred to...
Describing Quasi-Graphic Matroids
August 1, 2018
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Mathematics
Combinatorics
The class of quasi-graphic matroids recently introduced by Geelen, Gerards,
and Whittle generalises each of the classes of frame matroids and
lifted-graphic matroids introduced earlier by Zaslavsky. For each biased graph
(G,B) Z...
The econometrics of happiness: Are we underestimating the returns to
education and income?
July 31, 2018
|
Economics
Quantitative Finance
Econometrics
General Economics
Economics
Econometrics
General Economics
Economics
This paper describes a fundamental and empirically conspicuous problem
inherent to surveys of human feelings and opinions in which subjective
responses are elicited on numerical scales. The paper also proposes a solution.
The problem is a t...
EBIC: an open source software for high-dimensional and big data
biclustering analyses
July 25, 2018
|
Quantitative Biology
Computer Science
Statistics
Genomics
Machine Learning
Machine Learning
Motivation: In this paper we present the latest release of EBIC, a
next-generation biclustering algorithm for mining genetic data. The major
contribution of this paper is adding support for big data, making it possible
to efficiently run la...
Open Gromov-Witten invariants and Boundary States
July 23, 2018
|
Mathematics
Symplectic Geometry
Symplectic Geometry
In this note we show how Kontsevich-Soibelman algebra arise naturally in Open
Gromov-Witten theory for not compact geometries....
Mapping class groupoids and Thompson's groups
July 23, 2018
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Mathematics
Geometric Topology
We introduce a groupoid {\mathbf{\Pi MG}}}, called the fundamental modular
groupoid, which is a variant of Penner's mapping class groupoid. We study how
it relates to the surface mapping class groups and Thompson's group T. We a...
Fundamental groups and group presentations with bounded relator lengths
July 23, 2018
Mathematics
Metric Geometry
Algebraic Topology
Group Theory
We study the geometry of compact geodesic spaces with trivial first Betti
number admitting large finite groups of isometries. We show that if a finite
group G acts by isometries on a compact geodesic space X whose first Betti
number van...
Looking to the Blue Sky with Colored Patterns
July 20, 2018
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Physics
Physics Education
This work presents a simple alternative technique to observe the polarization
of the skylight on Earth. Using a birefringent material and a polarizer to look
at the polarized light from the blue sky, it is possible to see a colored
pattern ...
On the cardinality of unique range sets with weight one
July 19, 2018
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Mathematics
Complex Variables
Two meromorphic functions f and g are said to share the set S⊂C∪{∞} with weight l∈N∪{0}∪{∞},
if Ef(S,l)=Eg(S,l) where $$E_{f}(S,l)=\bigcup\limits_{a \in S}\{(z,t)
\in \math...