3 papers
math.OC2026
Fixed-Point Delayed Subgradient Methods for Nonsmooth Convex Optimization Problems
Ontima Pankoon, Nimit Nimana, Yeol Je Cho
In this paper, we consider the nonsmooth convex optimization problems over the fixed point constraint sets of firmly nonexpansive operators. To find an optimal solution of the prob…
math.OC2026
Federated Incremental Subgradient Method for Convex Bilevel Optimization Problems
Sudkobfa Boontawee, Mootta Prangprakhon, Nimit Nimana
In this letter, we consider a bilevel optimization problem in which the outer-level objective function is strongly convex, whereas the inner-level problem consists of a finite sum…
math.OC2025
Subgradient Splitting Methods for Nonsmooth Fractional Programming with Fixed-Point Constraints
Mootta Prangprakhon, Nimit Nimana
We consider a class of nonsmooth fractional programming problems with fixed-point constraints, where the numerator is convex and the denominator is concave. To solve this problem,…