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math104-s21:s:divi

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Divi Schmidt

The following notes are organized by lecture date. The notes from lecture are handwritten on my iPad and vary in format depending on the content of the lecture. I include questions underneath the relevant lecture notes. Additionally, there is a short summary for each lecture that includes my thoughts on the content and discusses the content in perspective of the entire course.

Jan 19

This lecture is the foundation of the rest of the course. We start from the naturals and build everything in the course off of this first number set. It is quite amazing everything that we can construct from this very first concept, and something that one cannot appreciate until much later in the course. We also introduce induction, which is also a fundamental (and also very cool) concept for constructing proofs, something we do a lot of in this course.

Notes: jan19.pdf

Jan 21

We continue with foundational definitions in this lecture, introducing the idea of min, max, sup, and inf. We also distinguish the reals from the rest of the sets with the Completeness Axiom. These concepts dominate the first half of the course as we begin to analyze sequences and limits.

Notes: jan21.pdf

Jan 26

The limit lecture

In this lecture, we introduce the idea of sequences and limits. The definition of a limit is not something that should be forgotten, since we use this to prove not only all other theorems in this lecture, but it pops up again and again and again through the rest of the course. For me, this was a really interesting lecture as it formalized the idea of a limit, something that has been taught to me again and again using a very hand-wavy explanation. Additionally, this is the first place we show how important epsilon can be when proving ideas, especially when we are talking about anything related to infinity. There's a lot of really interesting things we can prove using epsilon. Using it while proving limits gives us some practice with this idea.

Notes: jan26.pdf

Jan 28

Feb 2

Feb 4

Feb 9

Feb 11

Feb 16

Feb 18

Feb 23

Feb 25

Mar 2

Mar 4

Mar 9

Mar 11

Mar 16

Mar 18

April 6

Notes: april6.pdf

Apr 8

Apr 13

Apr 15

Apr 20

Apr 22

Apr 27

Apr 29

math104-s21/s/divi.1620533575.txt.gz · Last modified: 2026/02/21 14:44 (external edit)