We generalize Mycielski ideals getting a large family of
-ideals
of subsets of
.
Each ideal in the family is determined by a collection of elements of
- so called generating system. We study the relations between the
ideals generated by different systems and between these ideals and the
classical ideals: the null ideal and the meager ideal. Further we investigate
dependence of cardinal invariants of Mycielski ideals on the generating
systems.