Results 1 to 10 of about 551 (44)

Spectral Metric Spaces on Extensions of C*-Algebras [PDF]

open access: yes, 2016
We construct spectral triples on C*-algebraic extensions of unital C*-algebras by stable ideals satisfying a certain Toeplitz type property using given spectral triples on the quotient and ideal.
Hawkins, Andrew, Zacharias, Joachim
core   +5 more sources

Multiresolution expansions of distributions : pointwise convergence and quasiasymptotic behavior [PDF]

open access: yes, 2015
In several variables, we prove the pointwise convergence of multiresolution expansions to the distributional point values of tempered distributions and distributions of superexponential growth. The article extends and improves earlier results by G.
Kostadinova, Sanja, Vindas Diaz, Jasson
core   +2 more sources

Ultrafunctions and Applications [PDF]

open access: yes, 2014
This paper deals with a new kind of generalized functions, called "ultrafunctions" which have been introduced recently and developed in some previous works.
Baglini, Lorenzo Luperi, Benci, Vieri
core   +2 more sources

Analytic Regularity and GPC Approximation for Control Problems Constrained by Linear Parametric Elliptic and Parabolic PDEs [PDF]

open access: yes, 2013
This paper deals with linear-quadratic optimal control problems constrained by a parametric or stochastic elliptic or parabolic PDE. We address the (difficult) case that the state equation depends on a countable number of parameters i.e., on $\sigma_j ...
Kunoth, Angela, Schwab, Christoph
core   +1 more source

Quantum theta functions and Gabor frames for modulation spaces [PDF]

open access: yes, 2008
Representations of the celebrated Heisenberg commutation relations in quantum mechanics and their exponentiated versions form the starting point for a number of basic constructions, both in mathematics and mathematical physics (geometric quantization ...
A. Connes   +41 more
core   +4 more sources

On Parseval frames of exponentially decaying composite Wannier functions

open access: yes, 2017
Let $L$ be a periodic self-adjoint linear elliptic operator in $\R^n$ with coefficients periodic with respect to a lattice $\G$, e.g. Schr\"{o}dinger operator $(i^{-1}\partial/\partial_x-A(x))^2+V(x)$ with periodic magnetic and electric potentials $A,V$,
Auckly, David, Kuchment, Peter
core   +1 more source

Spectral triples and associated Connes-de Rham complex for the quantum SU(2) and the quantum sphere [PDF]

open access: yes, 2002
We construct spectral triples for the C^*-algebra of continuous functions on the quantum SU(2) group and the quantum sphere. There has been various approaches towards building a calculus on quantum spaces, but there seems to be very few instances of ...
Arupkumar Pal   +11 more
core   +2 more sources

The semi-classical expansion and resurgence in gauge theories: new perturbative, instanton, bion, and renormalon effects [PDF]

open access: yes, 2012
We study the dynamics of four dimensional gauge theories with adjoint fermions for all gauge groups, both in perturbation theory and non-perturbatively, by using circle compactification with periodic boundary conditions for the fermions.
A Armoni   +69 more
core   +2 more sources

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