[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**
*
*
**
**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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