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Q&A for professional mathematicians
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Let $A$ be a $C^*$-algebra and $(a_{ij}) \in M_n(A)$ be a positive matrix. Does there exist a constant $C \ge 0$ (not depending on the $a_{ij}$) such that $$\lVert(a_{ij})\rVert \le C \Bigl\lVert\s...
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Hottest Questions Today - MathOverflow
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Mathoverflow.net news digest
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15 years
Functions whose antiderivative behaves like $xf(x)$
I'm wondering if a classification of analytic functions $f$ (it may be that $C^1$ is enough, but I'm not taking any chances, if you have a reason why I only need to consider a larger class of functions, I would enjoy that as well) with the property ...
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10 days
Finding rational points to an elliptic curve equation with very large coefficien...
I have been working on this elliptic curve equation:$y^2 = 102516622445224071181618629075661543598435443927642055302797028500\cdot x^{3} + 170288003150088713211165229564777675866712767658935950737783670400\cdot x^{2} + 942871615197123245625774117840...
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9 years
Inequalities for marginals of distribution on hyperplane
Let $H = \{ (a,b,c) \in \mathbb{Z}_{\geq 0}^3 : a+b+c=n \}$. If we have a probability distribution on $H$, we can take its marginals onto the $a$, $b$ and $c$ variables and obtain three probability distributions $\alpha$, $\beta$ and $\gamma$ in $\mathbb...
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9 years
When a journal doesn't give your work a fair chance [closed]
There is no way around the fact that determinations about the relative contributions of papers and journal acceptances will always be highly subjective. In addition, editors and referees are busy people and contribute their time on a near volunteer basis...
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