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cs89
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  • Paris, France
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11
Prove $ \frac{x_1-x_2}{x_n+x_1} + \frac{x_2-x_3}{x_1+x_2}+\cdots+ \frac{x_n-x_1}{x_{n-1} +x_n}\le 0$ s.t. $x_1+\cdots+x_n=1$
Apr 30, 2023
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10
Shape that a bending rod makes
May 15, 2023
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9
Is a piecewise linear function always a sum of concave and convex functions?
May 15, 2023
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5
Generalisation of Baker–Campbell–Hausdorff (Matrix exponential simplification)
Mar 10, 2023
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5
A Question on the Proof of A Form of the Minkowski Inequality
Apr 13, 2023
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4
Pontryagin's Principle is a "necessary" condition?
Apr 30, 2023
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4
Does the convergence of $\int_{0}^\infty |f(x)|\,dx$ imply the convergence of $\int_{0}^\infty f(x)\,dx$?
Apr 21, 2023
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4
Closedness of operator Hardy type
Mar 31, 2023
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4
Can solution of any differential equation be expressed as power series?
Apr 14, 2023
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4
Is $x^a $sin$(x^{-a})$ Hölder continuous?
May 15, 2023
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Where to upload digitized LaTeX versions of old papers?
8
When are complex polynomial maps surjective?
7
Proving that a specific kernel is positive definite
7
Can we interpret fractional Sobolev spaces in terms of fractional derivatives?
5
Hardy-Littlewood-Sobolev inequality using fractional sobolev norm on the RHS