VividD
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Member for 10 years, 6 months
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Last seen more than 5 years ago
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Pearls I found on this site
Can an irrational number raised to an irrational power be rational?
A (probably trivial) induction problem: $\sum_2^nk^{-2}\lt1$
Innocent-looking Diophantine equation with smallest solution of the order $10^{50}$?
Picture/intuitive proof of $\cos(3 \theta) = 4 \cos^3(\theta)-3\cos(\theta)$?
Proving a trigonometric identity: $\frac{\cos x}{1-\sin x} -\tan x = \sec x$
Cover a plane with parabolas and hyperbolas
What is the (mathematical) point of straightedge and compass constructions?
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