[Seminario] INVITACION SEMINARIO OPTIMIZACIÓN AND EQUILIBRIO, MIÉRCOLES 14 DE MARZO A LAS 16:30 HRS.
Maria Ines
mrivera en dim.uchile.cl
Jue Mar 1 14:32:54 -03 2018
Estimados Académicos y Alumnos,
Se les invita para el próximo miércoles 14 de marzo a las 16:30 hrs, al
*S**eminar Optimization and Equilibrium*, el cual tendrá lugar en la
sala de seminarios John Von Neumann del CMM, ubicada en Beauchef 851,
Séptimo Piso Torre Norte.
*Seminar**
**
**Optimization and Equilibrium**
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*
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**Invited speaker**
**Marcus Carlsson**
**Lund University, Sweden**
**
**Title**
**
**On regularization/convexification of functionals including an
l2-misfit term *
*
*
**
***Abstra**ct: **
*
A common technique for solving ill-posed inverse problems is to include
some sparsity/low-rank constraint, and pose it as a convex optimization
problem, as is done e.g. in compressive sensing. The corresponding
functional to be minimized often includes an l2 data fidelity term plus
a convex term forcing sparsity. However, for many applications a
non-convex term would be more suitable, although this is
usually discarded since it leads to issues with algorithm convergence,
local minima etc. I will introduce a new transform
to (partially) convexify non-convex functionals of the above type. In
some settings this leads to a convex problem, and in more complicated
scenarios we can prove that the modified functional shares minima with
the original functional, as well as give concrete conditions implying
that a given stationary point is indeed the sought global minima.
Esperando contar con su presencia, les saluda,
Ma. Inés Rivera
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