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David Corfield's user avatar
David Corfield's user avatar
David Corfield's user avatar
David Corfield
  • Member for 14 years, 2 months
  • Last seen more than 1 year ago
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Question about $i$ versus $-i$
Apr 7, 2021
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38
Direct proof of irrationality?
34
The set-theoretic multiverse as a (bi)category
25
The concept of duality
24
whence commutative diagrams?
21
When and why do universal objects have extra properties?

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