123,645 research outputs found
A NOTE ON COMONOTONICITY AND POSITIVITY OF THE CONTROL COMPONENTS OF DECOUPLED QUADRATIC FBSDE
In this small note we are concerned with the solution of Forward-Backward
Stochastic Differential Equations (FBSDE) with drivers that grow quadratically
in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem
is a comparison result that allows comparing componentwise the signs of the
control processes of two different qgFBSDE. As a byproduct one obtains
conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio
Phase diagram of a 2D Ising model within a nonextensive approach
In this work we report Monte Carlo simulations of a 2D Ising model, in which
the statistics of the Metropolis algorithm is replaced by the nonextensive one.
We compute the magnetization and show that phase transitions are present for
. A phase diagram (critical temperature vs. the entropic
parameter ) is built and exhibits some interesting features, such as phases
which are governed by the value of the entropic index . It is shown that
such phases favors some energy levels of magnetization states. It is also
showed that the contribution of the Tsallis cutoff is essential to the
existence of phase transitions
Empreendedorismo em economias em desenvolvimento: uma aplicação ao sector turístico
O contexto idiossincrático dos países em desenvolvimento, marcadamente distinto dos países da Tríade normalmente objeto de investigação académica, poderá levar a efeitos na decisão de empreender.turístico, de Jeremias Dias Furtado, Antonia Mercedes García Cabrera e Maria Gracia García Soto. A obra, resultado de uma tese de doutoramento, oferece uma abordagem institucional à problemática do empreendedorismo. A abordagem institucional estabelece as bases para um estudo empírico sobre a realidade de Cabo Verde que permite validar as relações propostas. A abordagem institucional selecionada é particularmente adequada para abordar a questão do empreendedorismo em países em desenvolvimento. As condições institucionais, nomeadamente os défices em instituições que potenciem o empreendedorismo, serão um fator distintivo determinante entre economias desenvolvidas e economias em desenvolvimento.info:eu-repo/semantics/publishedVersio
Phase Motion in the Scalar Low-Mass Amplitude in
This work is a direct and model-independent measurement of the low mass
phase motion in the decay. The results
show a strong phase variation, compatible with an isoscalar
meson. This result confirms the previous Fermilab E791 result which found
evidence for the existence of this scalar particle using a full Dalitz-plot
analysis.Comment: 5 pages, 2 figures, talk given at X International Conference on
Hadron Spectroscopy (HADRON '03), Aschaffenburg, German
Importing SMT and Connection proofs as expansion trees
Different automated theorem provers reason in various deductive systems and,
thus, produce proof objects which are in general not compatible. To understand
and analyze these objects, one needs to study the corresponding proof theory,
and then study the language used to represent proofs, on a prover by prover
basis. In this work we present an implementation that takes SMT and Connection
proof objects from two different provers and imports them both as expansion
trees. By representing the proofs in the same framework, all the algorithms and
tools available for expansion trees (compression, visualization, sequent
calculus proof construction, proof checking, etc.) can be employed uniformly.
The expansion proofs can also be used as a validation tool for the proof
objects produced.Comment: In Proceedings PxTP 2015, arXiv:1507.0837
Light Quark Spectroscopy and Charm Decays
Weak decays of charm mesons has been used for studies of light quark
spectroscopy, with particular emphasis on the J^{PC}=0^{++} states. Recent
results on light scalars are summarized and some conceptual issues are
discussed, especially the relation between charm decays and hadronic
production.Comment: Talk presented at International Workshop on Frontier Science,
Frascati,7-11 October 2002, 8 pages, 2 figure
- …