Bernard Helffer
- From resolvent bounds to semigroup bounds
2010/01/23 by Bernard Helffer, Johannes Sjoestrand, Helffer, Bernard +1 · 1 citation
Computer Science · Mathematics · #35P05 #47D06 #Advanced Mathematical Modeling in Engineering #FOS: Mathematics #Functional Analysis (math.FA) #Numerical methods in inverse problems #Spectral Theory (math.SP) #Spectral Theory in Mathematical Physics
- Exponential localization of Steklov eigenfunctions on warped product manifolds: the flea on the elephant phenomenon
2021/03/25 by Thierry Daudé, Bernard Helffer, Daudé, Thierry +3 · 1 citation
Engineering · Mathematics · #Analysis of PDEs (math.AP) #FOS: Mathematics #FOS: Physical sciences #Geometric Analysis and Curvature Flows #Mathematical Physics (math-ph) #Spectral Theory (math.SP) #Spectral Theory in Mathematical Physics #Stability and Controllability of Differential Equations
- Matrix representation of Magnetic pseudo-differential operators via tight Gabor frames
2022/12/23 by Horia D. Cornean, Bernard Helffer, Cornean, Horia D. +3 · 1 citation
Computer Science · Mathematics · #81Q15. Secondary: 35S05 #Analysis of PDEs (math.AP) #FOS: Mathematics #FOS: Physical sciences #Image and Signal Denoising Methods #Mathematical Analysis and Transform Methods #Mathematical Physics (math-ph) #Primary: 81Q10
- Global counterexamples to uniqueness for a Calderón problem with Ck conductivities
2024/06/20 by Thierry Daudé, Bernard Helffer, Daudé, Thierry +5 · 1 citation
Computer Science · Engineering · Mathematics · #35P25 #58J50 #81U40 #Advanced Mathematical Modeling in Engineering #Analysis of PDEs (math.AP) #FOS: Mathematics #FOS: Physical sciences #Mathematical Physics (math-ph) #Numerical methods in inverse problems #Spectral Theory (math.SP) #Stability and Controllability of Differential Equations
- The index of sub-laplacians: beyond contact manifolds
2024/07/31 by Magnus Goffeng, Bernard Helffer, Goffeng, Magnus +1 · 1 citation
Mathematics · #Geometry and complex manifolds
- Trace formulas for the magnetic Laplacian and Dirichlet to Neumann operator -- Explicit expansions --
2024/07/11 by Bernard Helffer, Helffer, Bernard, François Nicoleau +1 · 1 citation
Computer Science · Mathematics · #35P25 #81U40 #Advanced Mathematical Modeling in Engineering #Analysis of PDEs (math.AP) #FOS: Mathematics #FOS: Physical sciences #Mathematical Physics (math-ph) #Numerical methods in inverse problems #Spectral Theory (math.SP) #Spectral Theory in Mathematical Physics