ACTA SCIENTIARUM MATHEMATICARUM (Szeged)

Géza Fodor

Editors

Tensor operations on characteristic functions of $C_0$ contractions

H. Bercovici, D. Voiculescu

Normal dilations and operator approximations

R. H. Bouldin, D. D. Rogers

Distributive lattices whose prime ideals are principal

V. R. Chandran, H. Lakser

Eigenvectors of unitary $\rho$-dilations

E. Durszt

On the spectrum of contractions of class $C_1$

G. Eckstein

On modules over Dedekind rings

S. Feigelstock

Congruence-equalities and Mal'cev conditions in regular equation classes

H. P. Gumm

On the problem of the choice of first approximants in a two-sided iteration method

J. Hegedűs

The radical in ring varieties

A. A. Iskander

Theory of radicals for hereditarily artinian rings

A. Widiger, R. Wiegandt

Complements of radicals in the class of hereditarily artinian rings

L. C. A. van Leeuwen

Change of the sum of digits by multiplication

I. Kátai

O vlozhenii polugrupp v polugruppu, v kotoroi iskhodnye polugruppy yavlyayutcya nezavisimymi

L. Megyesi

Similarity and interpolation between projectors

Z. V. Kovarik

Moment inequalities for the maximum of partial sums of random fields

F. Móricz

On an extension of semigroups

M. B. Szendrei

Generalization of the implicit function theorem and of Banach's open mapping theorem

T. Szilágyi

Endomorphism and subalgebra structure; a concrete characterization

N. Sauer, G. Stone

On normal subgroups of semigroups with identity

M. Rockenbauer