Good Site for Advance Math Concepts
I often come across advanced concepts on this site I want to learn more about (explanations or proofs of theories, detailed examples of principles I don't understand, etc.). Does anyone know of a good site I can go to?
I've gone to wikipedia on many occasions, but it's really not that helpful unless I have a decent understanding of the concept I'm looking up. Their examples are bad and the technical jargon is sometimes impossible to comprehend. Wikipedia is done more as a quick reference then as a detailed resource.