We prove that the smallest degree of an apolar 0-dimensional scheme of a
general cubic form in n+1 variables is at most 2n+2, when n≥8, and
therefore smaller than the rank of the form. For the general reducible cubic
form the smal...
The automorphism group of Mg,n
October 7, 2011
Mathematics
Algebraic Geometry
Let Mg,n be the moduli stack parametrizing
Deligne-Mumford stable n-pointed genus g curves and let
Mg,n be its coarse moduli space: the Deligne-Mumford
compactification of the moduli space of $n...
Sharp estimates for the convergence rate of Orthomin(k) for a class of
linear systems
September 12, 2011
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Mathematics
Computer Science
Numerical Analysis
Numerical Analysis
In this work we show that the convergence rate of Orthomin(k) applied to
systems of the form (I+ρU)x=b, where U is a unitary operator and
0<ρ<1, is less than or equal to ρ. Moreover, we give examples of
operators U ...
VBFNLO: A parton level Monte Carlo for processes with electroweak bosons
-- Manual for Version 3.0
July 20, 2011
| | | | | | | | | | and others
Physics
High Energy Physics - Phenomenology
High Energy Physics - Experiment
VBFNLO is a flexible parton level Monte Carlo program for the simulation of
vector boson fusion (VBF), QCD-induced single and double vector boson
production plus two jets, and double and triple vector boson production (plus
jet) in hadronic...
Probabilistic Methods on Erdos Problems
July 17, 2011
Computer Science
Discrete Mathematics
The ideas here are a continuation of a previous article. Some of the
applications of the main ideas in the previous article are explained, along
with some limitations of the general ideas. There are situations where
additional hypotheses al...
La formule des traces pour les rev\^etements de groupes r\'eductifs
connexes. II. Analyse harmonique locale
July 10, 2011
Mathematics
Representation Theory
We establish some results in local harmonic analysis which are necessary for
Arthur's invariant trace formula for coverings of connected reductive groups.
More precisely, for local coverings we will study (1) the Plancherel formula
and its ...
Some scales in neutrino physics
June 28, 2011
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Physics
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology
The problem of an active neutrinos mass origin is considered at the
phenomenological level. At first an assumption is made that neutrino mass
values depend on two contributions with their characteristic scales, a next
assumption consists in...
Quantum cohomology of twistor spaces and their Lagrangian submanifolds
June 20, 2011
Mathematics
Symplectic Geometry
Differential Geometry
We compute the classical and quantum cohomology rings of the twistor spaces
of 6-dimensional hyperbolic manifolds and the eigenvalues of quantum
multiplication by the first Chern class. Given a half-dimensional totally
geodesic submanifold ...
Notes characterising higher and derived stacks concretely
May 24, 2011
Mathematics
Algebraic Geometry
Algebraic Topology
This is an informal summary of the main concepts in arXiv:0905.4044, based on
notes of various seminars. It gives constructions of higher and derived stacks
without recourse to the extensive theory developed by Toen, Vezzosi and Lurie.
Expl...
The lepton flavor violating decays Z→lilj in the simplest little
Higgs model
April 18, 2011
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Physics
High Energy Physics - Phenomenology
In the simplest little Higgs model the new flavor-changing interactions
between heavy neutrinos and the Standard Model leptons can generate
contributions to some lepton flavor violating decays of Z-boson at one-loop
level, such as $Z \to ...