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Pablo A Parrilo

4 accepted papers

2026

Beyond RLHF and NLHF: Population-Proportional Alignment under an Axiomatic Framework

ICLR 2026poster

Conventional preference learning methods often prioritize opinions held more widely when aggregating preferences from multiple evaluators. This may result in policies that are biased in favor of some types of opinions or groups and susceptible to strategic manipulation. To address this issue, we de…

Cited by 0SourceScholar
2026

Collaborative and Efficient Fine-tuning: Leveraging Task Similarity

ICML 2026poster

*Adaptability* has been regarded as a central feature in the foundation models, enabling them to effectively acclimate to unseen downstream tasks. Parameter-efficient fine-tuning methods such as celebrated LoRA facilitate efficient adaptation of large foundation models using labeled, high-quality an…

Cited by 0SourceScholar
2025

A New Semidefinite Relaxation for Linear and Piecewise-Affine Optimal Control with Time Scaling

ICRA 2025

We introduce a semidefinite relaxation for optimal control of linear systems with time scaling. These problems are inherently nonconvex, since the system dynamics involves bilinear products between the discretization time step and the system state and controls. The proposed relaxation is closely rel

Cited by 4SourceScholar
2017

When Cyclic Coordinate Descent Outperforms Randomized Coordinate Descent

NeurIPS 2017spotlight

The coordinate descent (CD) method is a classical optimization algorithm that has seen a revival of interest because of its competitive performance in machine learning applications. A number of recent papers provided convergence rate estimates for their deterministic (cyclic) and randomized variants…

Cited by 49SourcePDFScholar