4 papers
Towards Reliable Recommender Systems for Rating Data
Aurore Archimbaud, Andreas Alfons, Ines Wilms
Recommender systems are widely used in the digital landscape to match users with content fitting their preferences. However, growing concerns about fake accounts, strategic manipul…
A Note on the Folding Test of Unimodality: limitation and improved alternative
Colombe Becquart, Aurore Archimbaud, Anne M. Ruiz +1
This note addresses a key limitation of the Folding Test of Unimodality (FTU). In specific univariate mixture settings, the folding-based criterion can systematically fail, misclas…
Invariant Coordinate Selection and Fisher discriminant subspace beyond the case of two groups
Colombe Becquart, Aurore Archimbaud, Anne Ruiz-Gazen +2
Invariant Coordinate Selection (ICS) is a multivariate technique that relies on the simultaneous diagonalization of two scatter matrices. It serves various purposes, including its…
Generalized implementation of invariant coordinate selection with positive semi-definite scatter matrices
Aurore Archimbaud
Invariant coordinate selection is an unsupervised multivariate data transformation useful in many contexts such as outlier detection or clustering. It is based on the simultaneous…