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  4. Composite convex minimization involving self-concordant-like cost functions
 
conference paper

Composite convex minimization involving self-concordant-like cost functions

Tran Dinh, Quoc  
•
Li, Yen-Huan  
•
Cevher, Volkan  orcid-logo
2015
Modelling, Computation and Optimization in Information Systems and Management Sciences
Modelling, Computation and Optimization in Information Systems and Management Sciences (MCO 2015)

The self-concordant-like property of a smooth convex function is a new analytical structure that generalizes the self-concordant notion. While a wide variety of important applications feature the self- concordant-like property, this concept has heretofore remained unexploited in convex optimization. To this end, we develop a variable metric framework of minimizing the sum of a "simple" convex function and a self-concordant-like function. We introduce a new analytic step-size selection procedure and prove that the basic gradient algorithm has improved convergence guarantees as compared to "fast" algorithms that rely on the Lipschitz gradient property. Our numerical tests with real-data sets show that the practice indeed follows the theory.

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