Search Results for author: Omid Sadeghi

Found 8 papers, 0 papers with code

Online SuBmodular + SuPermodular (BP) Maximization with Bandit Feedback

no code implementations7 Jul 2022 Adhyyan Narang, Omid Sadeghi, Lillian J Ratliff, Maryam Fazel, Jeff Bilmes

At round $i$, a user with unknown utility $h_q$ arrives; the optimizer selects a new item to add to $S_q$, and receives a noisy marginal gain.

Computational Efficiency Movie Recommendation

Fast First-Order Methods for Monotone Strongly DR-Submodular Maximization

no code implementations15 Nov 2021 Omid Sadeghi, Maryam Fazel

Then, we study $L$-smooth monotone strongly DR-submodular functions that have bounded curvature, and we show how to exploit such additional structure to obtain algorithms with improved approximation guarantees and faster convergence rates for the maximization problem.

Function Design for Improved Competitive Ratio in Online Resource Allocation with Procurement Costs

no code implementations23 Dec 2020 Mitas Ray, Omid Sadeghi, Lillian J. Ratliff, Maryam Fazel

We study the problem of online resource allocation, where multiple customers arrive sequentially and the seller must irrevocably allocate resources to each incoming customer while also facing a procurement cost for the total allocation.

A Single Recipe for Online Submodular Maximization with Adversarial or Stochastic Constraints

no code implementations NeurIPS 2020 Omid Sadeghi, Prasanna Raut, Maryam Fazel

In this paper, we consider an online optimization problem in which the reward functions are DR-submodular, and in addition to maximizing the total reward, the sequence of decisions must satisfy some convex constraints on average.

Online DR-Submodular Maximization with Stochastic Cumulative Constraints

no code implementations29 May 2020 Prasanna Sanjay Raut, Omid Sadeghi, Maryam Fazel

Stochastic long-term constraints arise naturally in applications where there is a limited budget or resource available and resource consumption at each step is governed by stochastically time-varying environments.

Online Continuous DR-Submodular Maximization with Long-Term Budget Constraints

no code implementations30 Jun 2019 Omid Sadeghi, Maryam Fazel

In this paper, we study a class of online optimization problems with long-term budget constraints where the objective functions are not necessarily concave (nor convex) but they instead satisfy the Diminishing Returns (DR) property.

Competitive Algorithms for Online Budget-Constrained Continuous DR-Submodular Problems

no code implementations30 Jun 2019 Omid Sadeghi, Reza Eghbali, Maryam Fazel

In this paper, we study a certain class of online optimization problems, where the goal is to maximize a function that is not necessarily concave and satisfies the Diminishing Returns (DR) property under budget constraints.

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