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
