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Michael's user avatar
Michael's user avatar
Michael's user avatar
Michael
  • Member for 9 years, 11 months
  • Last seen more than a week ago
  • Canada
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2
Real line with positive infinity adjoined: typeset more compactly
Oct 17, 2020
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59
What is the total sum of the cardinalities of all subsets of a set?
59
Collection of surprising identities and equations.
47
Are continuous self-bijections of connected spaces homeomorphisms?
43
Meaning of the identity $\det(A+B)+\text{tr}(AB) = \det(A)+\det(B) + \text{tr}(A)\text{tr}(B)$ (in dimension $2$)
42
If a continuous function is positive on the rationals, is it positive almost everywhere?