Lecture Notes I have arranged these more or less in order of (descending) quality. The first four sets of notes are (I would hope) carefully written and should have book quality. Some of the others are rather quick pieces.

Algebra: This is for use in my class Math 5353/5363 (Fall 2015/Spring 2016).
Chapter 1 2 3 4 5 6

Functional Analysis 1: This is the revised version of older notes on the same subject, for use in Math 6473 (Fall 2008).
Chapter 1 2 3 4 5 6 7 8 9 10
Or Chapters 1-10 in one file: Part 1

Functional Analysis 2: This just continues my notes from above, as used in my class Math 6483 (Spring 2009). The division into two parts is quite arbitrary and probably pointless, but somehow I felt that I deserved the joy of opening a new section here.
Chapter 11 12 13 14 15

Statistics: This is for use in my class Math 4743/5743 (Spring 2015). The main focus is on estimators and their properties. The approach is abstract and theoretical, with an attempt to give coherent, reasonably complete arguments, but all heavy machinery (measure theory, for example) is avoided.
Chapter 1 2 3 4 5 6

Random Walks: An elementary treatment of various rather amazing properties of 1D random walks, taken from Feller's book. It may be better to work with this source directly, but in no case should you miss out on this material. It will change your life (or at least the way you think about coin tosses), so don't forget to click here.

Harmonic Analysis on SO(3): A very cursory treatment of a number of related topics (spherical harmonics, representations of SO(3)), adapted from Dym-McKean, Fourier Series and Integrals. Occasionally, things are proved, but don't expect much in this direction. If still interested, click here.

Dynamical Systems: This is by no means a systematic introduction to the subject. Rather, it just gives a rather light presentation of two crowd-pleasers (this is the idea, at least): chaotic dynamics for the logistic map and the period 3 case of Sarkovski's theorem. See here.