ACTA SCIENTIARUM MATHEMATICARUM (Szeged)

Some problems and results on the local behaviour of arithmetical functions

I. Kátai

Boolean algebras of factor congruences

D. Bigelow, S. Burris

Generalized congruences and products of lattice varieties

E. Fried, G. Grätzer

Endomorphism monoids in minimal quasi primal varieties

M. E. Adams, D. M. Clark

Separation of the radical in ring varieties. II

A. V. Kelarev, M. V. Volkov

Subvarieties of varieties generated by graph algebras

E. W. Kiss, R. Pöschel, P. Pröhle

On *-bases in lattices of finite length

Zs. Lengvárszky

Hypersurfaces de type semi-symétrique dans $R^{n+1}$

L. Nicolescu, G. Pripoae

A maximal partial clone and a Slupecki-type criterion

L. Haddad, I. G. Rosenberg, D. Schweigert

On strong approximation with consequences of almost everywhere type

L. Leindler

On the strong convergence of orthogonal series with almost everywhere uniformly bounded orthonormal systems

I. Szalay

An interpretation of Cellina's example: negligibility via the failure of Peano's theorem

B. M. Garay

Some operational formulas of O. V. Viskov involving Laguerre polynomials

H. M. Srivastava

Contraction representations of semigroups in finite von Neumann algebras

I. Kovács, W. R. McMillen

The distance to operators with a fixed index

R. Bouldin

Approximation by unitary operators

A. F. M. ter Elst

Antinormal operators

A. F. M. ter Elst

Kernels of generalized derivations

T. Yusun

Algebraically compact elements of JBW*-triples

L. L. Stachó, J. M. Isidro

State extensions in transformation group $C^*$-algebras

S. Kawamura, H. Takemoto, J. Tomiyama

An integral formula for a Riemannian manifold with three orthogonal distributions

M. Banaszczyk, R. Majchrzak

Erratum to ``On a geometric problem concerning discs"

A. P. Bosznay, B. M. Garay