  The purpose of this paper is to introduce different types of operations on
fuzzy ideals of $\Gamma$-semirings and to prove subsequently that these
oprations give rise to different structures such as complete lattice, modular
lattice on some restricted class of fuzzy ideals of $\Gamma$-semirings. A
characterization of a regular $\Gamma$-semiring has also been obtained in terms
of fuzzy subsets.
