Approximation in the sense of Kato for the transport problem.
Approximation spectral d'un opérateur borné et normal à l'aide de ses fonctions de la densité spectrale
Approximation theorem for evolution operators
This paper is devoted to the study of the approximation problem for the abstract hyperbolic differential equation u'(t) = A(t)u(t) for t ∈ [0,T], where A(t):t ∈ [0,T] is a family of closed linear operators, without assuming the density of their domains.
Arcangeli's type discrepancy principles for a class of regularization methods using a modified projection scheme.
Arithmetic-geometric-harmonic mean of three positive operators.
Asymptotic optimality of generalized cross-validation for choosing the regularization parameter.
Asymptotische Fehlerschranken für Rayleigh-Ritz-Approximationen selbstadjungierter Eigenwertaufgaben.