Top network posts

• 79 Are there theoretical applications of trigonometry?
• 61 Did Joseph Fourier ever make a pure mathematical mistake?
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• 42 Is every noninvertible matrix a zero divisor?
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• 23 Second derivative of $\det(\mathbb{1}+tA)$?
• 23 If every five point subset of a metric space can be isometrically embedded in the plane then is it possible for the metric space also?
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