During my studies, as preparation for the exams, as well as to get a better understanding of some topics, I created various LaTeX notes. I decided to publish the notes that have seen enough care for proper (enough) citation, such that others may benefit form my work. Since these notes cover vastly different aspects, I do no longer have deep insights into all notes, especially for those not related to my current activities. Hence, I do not actively maintain most of the notes, so read with caution.