Halmos, "Measure Theory", GTM. If I recall: a sigma-ring is closed under complements and finite unions; a sigma-algebra is a sigma-ring containing the whole set; a measurable space is a set X and a sigma-ring of sub-sets of X which sum to X.
> Hello, > > I am a graduate student studying EE. One of the courses that I am taking > is probability. In this course, there were several homework questions > regarding sigma-algebra of sets and measurable spaces. Can anybody tell > me what the hell they are? I apologize for this stupid question, but > please help me. > > Regards, > ele-fan