Search Results for author: Steffen Borgwardt

Found 5 papers, 2 papers with code

An implementation of steepest-descent augmentation for linear programs

1 code implementation20 Nov 2019 Steffen Borgwardt, Charles Viss

Generalizing the simplex method, circuit augmentation schemes for linear programs follow circuit directions through the interior of the underlying polyhedron.

Optimization and Control 52B05, 90C05, 90C08, 90C10

Constructing Clustering Transformations

no code implementations10 Apr 2019 Steffen Borgwardt, Charles Viss

Clustering is one of the fundamental tasks in data analytics and machine learning.

Clustering

A Polyhedral Model for Enumeration and Optimization over the Set of Circuits

1 code implementation1 Nov 2018 Steffen Borgwardt, Charles Viss

In this paper, we provide a universal framework for enumerating the set of circuits and optimizing over sets of circuits of a polyhedron in any representation - we propose a polyhedral model in which the circuits of the original polyhedron are encoded as extreme rays or vertices.

Optimization and Control 52B05, 90C05, 90C08, 90C10

A balanced k-means algorithm for weighted point sets

no code implementations19 Aug 2013 Steffen Borgwardt, Andreas Brieden, Peter Gritzmann

In this paper, we present and analyze a generalization of $k$-means that is capable of handling weighted point sets and prescribed lower and upper bounds on the cluster sizes.

Clustering

On Soft Power Diagrams

no code implementations15 Jul 2013 Steffen Borgwardt

For this purpose, we devise a new model for the computation of a 'soft power diagram', which allows a soft separation of the clusters with 'point counting properties'; e. g. we are able to prescribe how many points we want to classify as outliers.

Clustering Outlier Detection

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