A semigroup in function algebra.
Die transfiniten Operationen der Ordnungstheorie.
Die überinvarianten und verwandte Kongruenzrelationen einer allgemeinen Algebra.
A general existence theorem on partial algebras and its special cases
Concerning some theorems of Marczewski on algebraic independence
Eine Verschärfung des Bernsteinschen Äquivalenzsatzes.
Zum Cayleyschen Darstellungssatz.
Natürliche Zahlen, Ordnung, Nachfolge.
Direct decompositions of partially ordered sets with zero.
On the completion of partial algebras
Symmetric approach to the fundamental notions of general topology
On shape preserving spline interpolation: existence theorems and determination of optimal splines
Two-sided approximations of inverses, square roots and Cholesky factors
Adaptive wavelet estimation of the diffusion coefficient under additive error measurements
We study nonparametric estimation of the diffusion coefficient from discrete data, when the observations are blurred by additional noise. Such issues have been developed over the last 10 years in several application fields and in particular in high frequency financial data modelling, however mainly from a parametric and semiparametric point of view. This paper addresses the nonparametric estimation of the path of the (possibly stochastic) diffusion coefficient in a relatively general setting. By...
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