Assur. U Univers des Formes

Étude des formes lexicographiques des fonctions booléennes simples, représentation à l'aide de l'opérateur U

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Traitement d’images multivariées avec l’arbre des formes

Résumé The Tree of Shapes (ToS) is a morphological tree that provides an high-level hierarchical, self-dual and contrast invariant representation of the image suitable for many image processing tasks.When dealing with color images, one cannot use the Tree of Shapes because its definition is ill-formed on multivariate data. Common workarounds such as marginal processing, or imposing a total orde...

Observatoire des Sciences de l ’ Univers de Grenoble

This work focuses on the seismic response of a volcano to different magmatic processes with the aim of sheding light on their driving physics as tracked by seismicity. We study seismic time series recorded at basaltic volcanoes and identify generic seismicity patterns characteristic of (i) inter-eruptive, (ii) reservoir feeding, (iii) reservoir leak, and (iv) dyke injection phases of volcanic a...

Phénomènes de symétrie dans des formes linéaires en polyzêtas

— We give two generalizations, in arbitrary depth, of the symmetry phenomenon used by Ball-Rivoal to prove that infinitely many values of Riemann ζ function at odd integers are irrational. These generalizations concern multiple series of hypergeometric type, which can be written as linear forms in some specific multiple zeta values. The proof makes use of the regularization procedure for multip...

Éditorial: Univers et expression