Search Results for author: Luca Venturi

Found 8 papers, 0 papers with code

On the Sample Complexity of Learning under Geometric Stability

no code implementations NeurIPS 2021 Alberto Bietti, Luca Venturi, Joan Bruna

Many supervised learning problems involve high-dimensional data such as images, text, or graphs.

valid

On the Sample Complexity of Learning under Invariance and Geometric Stability

no code implementations14 Jun 2021 Alberto Bietti, Luca Venturi, Joan Bruna

Many supervised learning problems involve high-dimensional data such as images, text, or graphs.

valid

Multilevel Stein variational gradient descent with applications to Bayesian inverse problems

no code implementations5 Apr 2021 Terrence Alsup, Luca Venturi, Benjamin Peherstorfer

The proposed multilevel Stein variational gradient descent moves most of the iterations to lower, cheaper levels with the aim of requiring only a few iterations on the higher, more expensive levels when compared to the traditional, single-level Stein variational gradient descent variant that uses the highest-level distribution only.

Depth separation beyond radial functions

no code implementations2 Feb 2021 Luca Venturi, Samy Jelassi, Tristan Ozuch, Joan Bruna

The first contribution of this paper is to extend such results to a more general class of functions, namely functions with piece-wise oscillatory structure, by building on the proof strategy of (Eldan and Shamir, 2016).

Depth separation for reduced deep networks in nonlinear model reduction: Distilling shock waves in nonlinear hyperbolic problems

no code implementations28 Jul 2020 Donsub Rim, Luca Venturi, Joan Bruna, Benjamin Peherstorfer

Classical reduced models are low-rank approximations using a fixed basis designed to achieve dimensionality reduction of large-scale systems.

Dimensionality Reduction

Diffusion-based Deep Active Learning

no code implementations23 Mar 2020 Dan Kushnir, Luca Venturi

To alleviate the load of data annotation, active deep learning aims to select a minimal set of training points to be labelled which yields maximal model accuracy.

Active Learning

Spurious Valleys in Two-layer Neural Network Optimization Landscapes

no code implementations18 Feb 2018 Luca Venturi, Afonso S. Bandeira, Joan Bruna

Focusing on a class of two-layer neural networks defined by smooth (but generally non-linear) activation functions, we identify a notion of intrinsic dimension and show that it provides necessary and sufficient conditions for the absence of spurious valleys.

Vocal Bursts Valence Prediction

Learning the Kernel for Classification and Regression

no code implementations22 Dec 2017 Chen Li, Luca Venturi, Ruitu Xu

We investigate a series of learning kernel problems with polynomial combinations of base kernels, which will help us solve regression and classification problems.

Classification General Classification +1

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