Manifold Sampling for Optimizing Nonsmooth Nonconvex Compositions
Journal Article
·
· SIAM Journal on Optimization
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Lehigh Univ., Bethlehem, PA (United States)
Here we propose a manifold sampling algorithm for minimizing a nonsmooth composition $$f= h\circ F$$, where we assume $$h$$ is nonsmooth and may be inexpensively computed in closed form and $$F$$ is smooth but its Jacobian may not be available. We additionally assume that the composition $$h\circ F$$ defines a continuous selection. Manifold sampling algorithms can be classified as model-based derivative-free methods, in that models of $$F$$ are combined with particularly sampled information about $$h$$ to yield local models for use within a trust-region framework. We demonstrate that cluster points of the sequence of iterates generated by the manifold sampling algorithm are Clarke stationary. We consider the tractability of three particular subproblems generated by the manifold sampling algorithm and the extent to which inexact solutions to these subproblems may be tolerated. Numerical results demonstrate that manifold sampling as a derivative-free algorithm is competitive with state-of-the-art algorithms for nonsmooth optimization that utilize first-order information about $$f$$.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1839939
- Journal Information:
- SIAM Journal on Optimization, Journal Name: SIAM Journal on Optimization Journal Issue: 4 Vol. 31; ISSN 1052-6234
- Publisher:
- Society for Industrial and Applied Mathematics (SIAM)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
| Derivative-Free Optimization of a Rapid-Cycling Synchrotron | text | January 2021 |
Similar Records
Manifold Sampling for Optimization of Nonconvex Functions That Are Piecewise Linear Compositions of Smooth Components
A proximal trust-region method for nonsmooth optimization with inexact function and gradient evaluations
Efficient proximal subproblem solvers for a nonsmooth trust-region method
Journal Article
·
Wed Oct 24 20:00:00 EDT 2018
· SIAM Journal on Optimization
·
OSTI ID:1491737
A proximal trust-region method for nonsmooth optimization with inexact function and gradient evaluations
Journal Article
·
Sun Dec 25 19:00:00 EST 2022
· Mathematical Programming
·
OSTI ID:2311742
Efficient proximal subproblem solvers for a nonsmooth trust-region method
Journal Article
·
Fri Jan 03 19:00:00 EST 2025
· Computational Optimization and Applications
·
OSTI ID:2505123