Epistemology by simplest definition is the theory of knowledge and one of the things it addresses is the source of knowledge. On the other hand we know that rationalism (deduction) and empiricism (induction) are two fundamental ways of learning and gaining knowledge.
Put them together, can we conclude that rationalism and empiricism are both members of a larger field called epistemology. In other words, can we mathematically claim that rationalism and empiricism are subsets of the epistemology super-set?