THE LATTICE OF INTERVAL-VALUED FUZZY IDEALS OF A RING Lee, Keon-Chang; Hur, Kul; Lim, Pyung-Ki;
We investigate the lattice structure of various sublattices of the lattice of interval-valued fuzzy subrings of a given ring. We prove that a special class of interval-valued fuzzy ideals of a ring. Finally, we show that the lattice of interval-valued fuzzy ideals of R is not complemented[resp. has no atoms(dual atoms)].