ACTA SCIENTIARUM MATHEMATICARUM (Szeged)

Topological quasi varieties

D. M. Clark, P. H. Krauss

A characterization of quasi-varieties in equality-free languages

P. E.-Tóth

Characterizations of some classes of semigroups

Gy. Pollák, O. Steinfeld

Basic permutation groups on infinite sets

L. Szabó

Subalgebra lattices, simplicity and rigidity

V. Koubek

On additive functions satisfying a congruence

I. Kátai

On systems of $N$-variable weighted shifts

R. Bansal, B. S. Yadav

Moment theorems for operators on Hilbert space. II.

Z. Sebestyén

$J$-unitary equivalence of positive subspaces of a Krein space

N. J. Young

On minimal invariant manifolds and density of operator algebras

H. Radjavi

On the spectral residuum of closed operators

W. Shengwang

On commuting unbounded self-adjoint operators. I.

K. Schmüdgen

A unified approach to fundamental theorems of approximation by sequences of linear operators and their dual versions

S. Ries, R. L. Stens

Steckin-type estimates for locally divisible multipliers in Banach spaces

W. Dickmeis, R. J. Nessel, E. van Wickeren

Unbedingte Konvergenz der Orthogonalreihen

K. Tandori

Remarks to a paper of V. Komornik

I. Joó

Linear combinations of iterated generalized Bernstein functions with an application to density estimation

W. Gawronski, U. Stadtmüller

O tsentrirovannykh sistemakh v $C[0,1]$

A. V. Bakhshetsyan

Small sum sets and the Faber gap condition

R. E. Dressler, L. Pingo

On approximation of the solutions of quasi-linear elliptic equations in $R^n$

L. Simon