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How to use mathematical concepts and statements
Fourier transforms front page
How to use compactness
How to use entropy
How to use fixed point theorems
How to use martingales
How to use tensor products
How to use tensor products and evaluation maps in representation theory
How to use the Bolzano-Weierstrass theorem
How to use the continuum hypothesis
How to use ultrafilters
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Geometric view of Hölder's inequality
Diagonal arguments
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)
Numerical optimization
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