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Mohammad Khalafi

dblp:329/8296 · DBLP profile ↗
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1ranked-venue papers
1as first author
1since 2021 · last 2023
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 first-author · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Theoretical computer science
1 paper
Mathematical optimization · 100%

Topics — the 4 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Mathematical optimization › continuous optimization › convex optimization › first-order methods › gradient-based optimization
accelerated gradient methods
0.712023
Accelerated Primal-Dual Methods for Convex-Strongly-Concave Saddle Point Problems · ICML 2023
Mathematical optimization
minimax optimization
0.712023
Accelerated Primal-Dual Methods for Convex-Strongly-Concave Saddle Point Problems · ICML 2023
Mathematical optimization
primal-dual method
0.712023
Accelerated Primal-Dual Methods for Convex-Strongly-Concave Saddle Point Problems · ICML 2023
Mathematical optimization › continuous optimization
convex optimization
0.212023
Accelerated Primal-Dual Methods for Convex-Strongly-Concave Saddle Point Problems · ICML 2023

Methods — techniques the papers use, named apart from their topics

primal-dual method · 0.7linear approximation · 0.7accelerated gradient descent · 0.7
YearPublicationVenuePosition
2023 Accelerated Primal-Dual Methods for Convex-Strongly-Concave Saddle Point Problems
abstract
We investigate a primal-dual (PD) method for the saddle point problem (SPP) that uses a linear approximation of the primal function instead of the standard proximal step, resulting in a linearized PD (LPD) method. For convex-strongly concave SPP, we observe that the LPD method has a suboptimal dependence on the Lipschitz constant of the primal function. To fix this issue, we combine features of Accelerated Gradient Descent with the LPD method resulting in a single-loop Accelerated Linearized Primal-Dual (ALPD) method. ALPD method achieves the optimal gradient complexity when the SPP has a semi-linear coupling function. We also present an inexact ALPD method for SPPs with a general nonlinear coupling function that maintains the optimal gradient evaluations of the primal parts and significantly improves the gradient evaluations of the coupling term compared to the ALPD method. We verify our findings with numerical experiments.
Mohammad Khalafi, Digvijay Boob
ICML1