1. The history of the division symbol (obelus) is fascinating! (DivisionByZero)
2. On the same blog: "What is the difference between a theorem, a lemma, and a corollary?"
3. The "glue function"
4. Free abridged Linear Algebra book from Sheldon Axler.
2. On the same blog: "What is the difference between a theorem, a lemma, and a corollary?"
3. The "glue function"
4. Free abridged Linear Algebra book from Sheldon Axler.
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