# 10/18 -- Group B: Complex numbers - 1 (Prof. Kirby Baker)

Going from real numbers (ordinary numbers) to complex numbers is like coming out of a tunnel. You can see much more of the mathematical landscape than you thought possible. Even some properties of real numbers that were mysterious before become clearer. This session will be an introduction to complex numbers, their basic properties, and some things you can do with them. In future sessions we'll discuss more applications, ranging from number theory to cell phones.