If you are a graduate student pursuing a Master's degree at George
Mason University, you should definitely take Math 639 rather than Math
494. If you are an undergraduate, you are generally recommended to take
Math 494 unless you have a special interest in working particularly
hard and you have spoken with me. In this case, you will need special
permission to take Math 639. Go to the main office and request a form
to enroll in a graduate course, and bring the form to me to sign.