Christian Kümmerle
Christian Kümmerle
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Iteratively Reweighted Least Squares
Sample-Efficient Geometry Reconstruction from Euclidean Distances using Non-Convex Optimization
The problem of finding suitable point embedding or geometric configurations given only Euclidean distance information of point pairs …
Ipsita Ghosh
,
Abiy Tasissa
,
Christian Kümmerle
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arXiv
Linear Convergence of Iteratively Reweighted Least Squares for Nuclear Norm Minimization
Low-rank matrix recovery problems are ubiquitous in many areas of science and engineering. One approach to solve these problems is …
Christian Kümmerle
,
Dominik Stöger
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DOI
Learning Transition Operators From Sparse Space-Time Samples
We consider the nonlinear inverse problem of learning a transition operator A from partial observations at T different times, in the …
Christian Kümmerle
,
Mauro Maggioni
,
Sui Tang
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arXiv
Recovering Simultaneously Structured Data via Non-Convex Iteratively Reweighted Least Squares
We propose a new algorithm for the problem of recovering data that adheres to multiple, heterogeneous low-dimensional structures from …
Christian Kümmerle
,
Johannes Maly
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Code
Poster
Slides
Link to Proceedings
arXiv
OpenReview
On the Convergence of IRLS and Its Variants in Outlier-Robust Estimation
Outlier-robust estimation involves estimating some parameters (e.g., 3D rotations) from data samples in the presence of outliers, and …
Liangzu Peng
,
Christian Kümmerle
,
René Vidal
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Poster
Slides
PDF w/ supplementary material
Global Linear and Local Superlinear Convergence of IRLS for Non-Smooth Robust Regression
We advance both the theory and practice of robust $\ell_p$-quasinorm regression for $p \in (0,1]$ by using novel variants of …
Liangzu Peng
,
Christian Kümmerle
,
René Vidal
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Poster
arXiv
OpenReview
Iteratively Reweighted Least Squares for Basis Pursuit with Global Linear Convergence Rate
The recovery of sparse data is at the core of many applications in machine learning and signal processing. While such problems can be …
Christian Kümmerle
,
Claudio Mayrink Verdun
,
Dominik Stöger
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Link to Proceedings
arXiv
OpenReview
A Scalable Second Order Method for Ill-Conditioned Matrix Completion from Few Samples
We propose an iterative algorithm for low-rank matrix completion that can be interpreted as an iteratively reweighted least squares …
Christian Kümmerle
,
Claudio Mayrink Verdun
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Poster
Link to Proceedings
Slides
Escaping Saddle Points in Ill-Conditioned Matrix Completion with a Scalable Second Order Method
We propose an iterative algorithm for low-rank matrix completion that can be interpreted as both an iteratively reweighted least …
Christian Kümmerle
,
Claudio Mayrink Verdun
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Code
Understanding and Enhancing Data Recovery Algorithms - From Noise-Blind Sparse Recovery to Reweighted Methods for Low-Rank Matrix Optimization
We prove new results about the robustness of noise-blind decoders for the problem of re- constructing a sparse vector from …
Christian Kümmerle
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