Search Results for author: Melanie Weber

Found 14 papers, 4 papers with code

On the hardness of learning under symmetries

no code implementations3 Jan 2024 Bobak T. Kiani, Thien Le, Hannah Lawrence, Stefanie Jegelka, Melanie Weber

We study the problem of learning equivariant neural networks via gradient descent.

Inductive Bias

Effective Structural Encodings via Local Curvature Profiles

1 code implementation24 Nov 2023 Lukas Fesser, Melanie Weber

We further show that combining local structural encodings, such as LCP, with global positional encodings improves downstream performance, suggesting that they capture complementary geometric information.

Mitigating Over-Smoothing and Over-Squashing using Augmentations of Forman-Ricci Curvature

1 code implementation17 Sep 2023 Lukas Fesser, Melanie Weber

Several rewiring approaches utilizing graph characteristics, such as curvature or the spectrum of the graph Laplacian, have been proposed.

Curvature-based Clustering on Graphs

no code implementations19 Jul 2023 Yu Tian, Zachary Lubberts, Melanie Weber

We consider several discrete curvature notions and analyze the utility of the resulting algorithms.

Clustering Community Detection +2

Continuum Limits of Ollivier's Ricci Curvature on data clouds: pointwise consistency and global lower bounds

no code implementations5 Jul 2023 Nicolas Garcia Trillos, Melanie Weber

Let $\mathcal{M} \subseteq \mathbb{R}^d$ denote a low-dimensional manifold and let $\mathcal{X}= \{ x_1, \dots, x_n \}$ be a collection of points uniformly sampled from $\mathcal{M}$.

LegalRelectra: Mixed-domain Language Modeling for Long-range Legal Text Comprehension

no code implementations16 Dec 2022 Wenyue Hua, Yuchen Zhang, Zhe Chen, Josie Li, Melanie Weber

We show that our model improves over general-domain and single-domain medical and legal language models when processing mixed-domain (personal injury) text.

Language Modelling Reading Comprehension

On a class of geodesically convex optimization problems solved via Euclidean MM methods

no code implementations22 Jun 2022 Melanie Weber, Suvrit Sra

We study geodesically convex (g-convex) problems that can be written as a difference of Euclidean convex functions.

BIG-bench Machine Learning Riemannian optimization

Identifying biases in legal data: An algorithmic fairness perspective

no code implementations21 Sep 2021 Jackson Sargent, Melanie Weber

The need to address representation biases and sentencing disparities in legal case data has long been recognized.

Fairness regression

Robust Large-Margin Learning in Hyperbolic Space

no code implementations NeurIPS 2020 Melanie Weber, Manzil Zaheer, Ankit Singh Rawat, Aditya Menon, Sanjiv Kumar

In this paper, we present, to our knowledge, the first theoretical guarantees for learning a classifier in hyperbolic rather than Euclidean space.

Representation Learning

Projection-free nonconvex stochastic optimization on Riemannian manifolds

no code implementations9 Oct 2019 Melanie Weber, Suvrit Sra

We present algorithms for both purely stochastic optimization and finite-sum problems.

Stochastic Optimization

Heuristic Framework for Multi-Scale Testing of the Multi-Manifold Hypothesis

1 code implementation1 Jul 2018 F. Patricia Medina, Linda Ness, Melanie Weber, Karamatou Yacoubou Djima

When analyzing empirical data, we often find that global linear models overestimate the number of parameters required.

Riemannian Optimization via Frank-Wolfe Methods

1 code implementation30 Oct 2017 Melanie Weber, Suvrit Sra

Both tasks involve geodesically convex interval constraints, for which we show that the Riemannian "linear" oracle required by RFW admits a closed-form solution; this result may be of independent interest.

Riemannian optimization

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