Search Results for author: Sara van de Geer

Found 9 papers, 2 papers with code

On the robustness of minimum norm interpolators and regularized empirical risk minimizers

no code implementations1 Dec 2020 Geoffrey Chinot, Matthias Löffler, Sara van de Geer

This article develops a general theory for minimum norm interpolating estimators and regularized empirical risk minimizers (RERM) in linear models in the presence of additive, potentially adversarial, errors.

Deep ReLU Programming

1 code implementation27 Nov 2020 Peter Hinz, Sara van de Geer

Feed-forward ReLU neural networks partition their input domain into finitely many "affine regions" of constant neuron activation pattern and affine behaviour.

Optimization and Control

Adaptive Rates for Total Variation Image Denoising

no code implementations17 Nov 2019 Francesco Ortelli, Sara van de Geer

We study the theoretical properties of image denoising via total variation penalized least-squares.

Image Denoising

Prediction bounds for higher order total variation regularized least squares

no code implementations24 Apr 2019 Francesco Ortelli, Sara van de Geer

We establish adaptive results for trend filtering: least squares estimation with a penalty on the total variation of $(k-1)^{\rm th}$ order differences.

Oracle inequalities for square root analysis estimators with application to total variation penalties

no code implementations28 Feb 2019 Francesco Ortelli, Sara van de Geer

Through the direct study of the analysis estimator we derive oracle inequalities with fast and slow rates by adapting the arguments involving projections by Dalalyan, Hebiri and Lederer (2017).

A Framework for the construction of upper bounds on the number of affine linear regions of ReLU feed-forward neural networks

no code implementations5 Jun 2018 Peter Hinz, Sara van de Geer

More precisely, the information about the number regions per dimensionality is pushed through the layers starting with one region of the input dimension of the neural network and using a recursion based on an analysis of how many regions per output dimensionality a subsequent layer with a certain width can induce on an input region with a given dimensionality.

On the total variation regularized estimator over a class of tree graphs

no code implementations4 Jun 2018 Francesco Ortelli, Sara van de Geer

We generalize to tree graphs obtained by connecting path graphs an oracle result obtained for the Fused Lasso over the path graph.

Asymptotic Confidence Regions for High-dimensional Structured Sparsity

no code implementations28 Jun 2017 Benjamin Stucky, Sara van de Geer

In the setting of high-dimensional linear regression models, we propose two frameworks for constructing pointwise and group confidence sets for penalized estimators which incorporate prior knowledge about the organization of the non-zero coefficients.

regression Vocal Bursts Intensity Prediction

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