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Mathematics
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s.harp
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Symmetrical equations are good in their place, but 'vector' is a useless survival, or offshoot from quaternions, and has never been of the slightest use to any creature.

Lord Kelvin in a letter to G.F. FitzGerald, 1896

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An old "list question" edited to include other points
May 29, 2019
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4
Edit summaries/revision history cannot handle MathJax properly
Jan 17, 2017
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Should perfectly fine questions that have been closed and have an answer be re-opened?
Nov 19, 2019
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What knot is this?
40
Is this function nowhere analytic?
38
Function that is the sum of all of its derivatives
29
Is the convex hull of a compact set compact?
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Is the convex hull of a compact set compact?