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Christophe Leuridan's user avatar
Christophe Leuridan's user avatar
Christophe Leuridan's user avatar
Christophe Leuridan
  • Member for 4 years
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17
Can nonnegative functions $f(x,y,z)$ be written as a product of pairwise functions $u(x,y) v(y,z) w(x, z)$?
12
Trigonometric inequality
11
If Series $\sum \sqrt\frac{a_n}{n}$ converges then $\sum a_n$ converges?
11
Conjecture: If matrix $M$ has entries (left to right, then top to botom) $\sin 1,\sin 2,\sin 3,\dots,\sin (n^2)$, where $n\ge 3$, then $\det M = 0$.
10
Solving a limit about sum of series