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Comments in green were written by me. Comments in blue were not written by me.
Great puzzle problems! Hint on #9: try starting with an analogous problem using smaller numbers (e.g. 3a + 10b). This helped me to see what I had to do more generally.
Noah
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Happy 3√3-3 Approximation Day!

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A surprising fact about quadrilaterals
Interesting tautologies

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Log-scaled axes

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PhD thesis, chapter ∞
PhD thesis, chapter 5
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Inverting a matrix
PhD thesis, chapter 2

Jan 2020

PhD thesis, chapter 1
Gaussian elimination
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