Abstract Algebra: Theory and Applications

Describe succinctly what a poset is. Do not just list the defining properties, but give a description that another student of algebra who has never seen a poset might understand. For example, part of your answer might include what type of common algebraic topics a poset generalizes, and your answer should be short on symbols.

How does a lattice differ from a poset? Answer this in the spirit of the previous question.

How does a Boolean algebra differ from a lattice? Again, answer this in the spirit of the previous two questions.

Give two (perhaps related) reasons why any discussion of finite Boolean algebras might center on the example of the power set of a finite set.

Describe a major innovation of the middle twentieth century made possible by Boolean algebra.