CONTENTS

A r t i c l e s :

*Beloslav Riecan: On the individual ergodic theorem in D-posets of fuzzy sets . . . 673*

*Danica Jakubikovd-Studenovskd: DR-irreducibility of connected monounary algebras*
with a cycle . . . 681

*Angel Ferrdndez, Pascual Lucas: On the Gauss map of B-scrolls in 3-dimensional*
Lorentzian space forms . . . 699

*Danica Jakubikovd-Studenovskd: DR-irreducibility of connected monounary algebras 705*
*J . Munoz, J . Rodriguez, F. J . Muriel: Weil bundles and jet spaces . . . 721*

*Carolyn A. Eschenbach, Frank J. Hall, Zhongshan Li: Eigenvalue distribution of cer-*
tain ray patterns . . . 749

*Jarolim Bures, Vladimir Soucek, Salomon Ofman: Integral transforms for divisors in*
Pn(C) and solutions of systems of PDE's . . . 763

*Moharram A. Khan: Commutativity of rings through a Streb's result . . . 791*

*Nikolaos Halidias, Nikolaos S. Papageorgiou: Quasilinear elliptic problems with mul-*
tivalued terms . . . 803

*Jan Cermdk: Asymptotic properties of differential equations with advanced argument 825*
*Gonca Giingoroglu, Abdullah Harmanci: On some classes of modules . . . 839*

*Qiu Jing-Hui: Sequential retractivities and regularity on inductive limits . . . 847*

*Vitezslav Novdk, Miroslav Novotny: Linear extensions of orderings . . . 853*

*Andrzej Nowik: Some topological properties of (^-covering sets . . . 865*

*Eva Spdnikovd: Oscillatory properties of solutions of three-dimensional differential*
systems of neutral type . . . 879

*F. J . Perez-Ferndndez, F. Benitez-Trujillo, A. Aizpuru: Characterizations of complete-*
ness of normed spaces through weakly unconditionally Cauchy series . . . 889