"If his patterns are more permanent than theirs, it is because they are made with ideas." ~ G. H. Hardy
This is a collection of notes and questions from modules I am taking or interested in at the National University of Singapore. The notes are mainly for personal reference, but they may also be useful for revision. If you have any additional remarks, alternative approaches, or related questions that could supplement the material, please feel free to share them with me by email. Corrections and clarifications are also welcome.