Definition: the branch of pure mathematics that deals only with the properties of a figure X that hold for every figure into which X can be transformed with a one-to-one correspondence that is continuous in both directions

Definition: the branches of mathematics that study and develop the principles of mathematics for their own sake rather than for their immediate usefulness

Definition: the study of anatomy based on regions or divisions of the body and emphasizing the relations between various structures (muscles and nerves and arteries etc.) in that region