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- Institut Élie Cartan de LorraineFR139 papers
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36 papers · 1 filter
Coherence-based Partial Exact Recovery Condition for OMP/OLS
Cedric Herzet, Charles Soussen, Jerome Idier +1
We address the exact recovery of the support of a k-sparse vector with Orthogonal Matching Pursuit (OMP) and Orthogonal Least Squares (OLS) in a noiseless setting. We consider the…
Uniqueness of the AdS Spacetime among Static Vacua with prescribed Null infinity
Oussama Hijazi, Sebastián Montiel
We prove that an -dimensional spin static vacuum with negative cosmological constant whose null infinity has a boundary admitting a non-trivial Killing spinor field is the A…
Geometric Whittaker models and Eisenstein series for Mp_2
Sergey Lysenko
Let X be a smooth projective curve over an algebraically closed field of characteristic >2. Let Bun_{Mp_2} be the stack of metaplectic bundles on X of rank 2. In this paper we stud…
The critical branching random walk in a random environment dies out
Olivier Garet, Régine Marchand
We study the possibility for branching random walks in random environment (BRWRE) to survive. The particles perform simple symmetric random walks on the -dimensional integer lat…
Exponential map and algebra associated to a Lie pair
Camille Laurent-Gengoux, Mathieu Stiénon, Ping Xu
In this note, we unveil homotopy-rich algebraic structures generated by the Atiyah classes relative to a Lie pair of algebroids. In particular, we prove that the quotient $…
Maximal sets with no solution to x+y=3z
Alain Plagne, Anne de Roton
In this paper, we are interested in a generalization of the notion of sum-free sets. We address a conjecture first made in the 90s by Chung and Goldwasser. Recently, after some com…