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Q&A for professional mathematicians
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Hottest Questions Today - MathOverflow
Skip to main content Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, ...
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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 $$\lVert(a_{ij})\rVert \le C \Bigl\lVert\s...
Mathoverflow.net news digest
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0 days
Are there discontinuous plurisubharmonic functions that are bounded below?
Are there examples of plurisubharmonic functions that are bounded below but not continuous?
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0 days
Existence and evaluation of natural densities for a mixed binary-balanced-ternar...
Let every integer $x$ be written in its finite balanced ternary expansion
$$x=\sum_{i\ge 0} a_i3^i,\qquad a_i\in\{-1,0,1\}.$$
Define a map $T:\mathbb Z\to\mathbb Z_{\ge 0}$ by -
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Number of solutions to the Plateau problem for CMC surfaces
I consider an immersed curve $\gamma:\mathbb{S}^1\to \mathbb{S}^2\subset \mathbb{R}^3$ and a number $H>0$. I am looking for criteria allowing me to count the number of immersed constant mean curvature $H$ disks $u:\mathbb{D}^2\to \mathbb{R}^3$ such...
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0 days
Compute all the faces of three convex cones
I need to know all the faces of the following three proper cones:
$K_1$ and $K_2$ in https://arxiv.org/pdf/2506.10319
$K_{2n}$ in https://arxiv.org/pdf/2510.06226
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| Updated: | July 07, 2025 |
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| Created: | July 14, 2009 |
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