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How to work without an identity element when you clearly need it
If you don't have an identity element, a set of local units is more than enough
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Geometric view of Hölder's inequality
Finding an interval for rational numbers with a high denominator
Try to prove a stronger result
Use self-similarity to get a limit from an inferior or superior limit.
Prove a consequence first
Lower degree by increasing dimension (or vice-versa)
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Plenty of LaTeX errors
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Countable but impredicative
I don't think this statement
3 days 3 hours
choice of the field
9 weeks 1 day
10 weeks 22 hours
39 weeks 3 days
Higher dimensional analogues
1 year 8 weeks