## 2018-12-10

I thought about some of the equivalences in this linear algebra summary table.

I proved some of the propositions in *Linear Algebra Done Right*.

I asked a question on Math Stack Exchange about the use of “conversely” in some proofs in *Linear Algebra Done Right*.

I thought about how to show that “divide the data points by the standard deviation” and “scale the data points by a constant so that the new standard deviation is 1” are the same.

I thought about some stuff related to composition of limits (in analysis), and did one exercise from Spivak’s *Calculus*.

I made some edits to the page Comparison of concepts in computability theory.

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