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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 $$\lVert(a_{ij})\rVert \le C \Bigl\lVert\s...
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Hottest Questions Today - MathOverflow
Stack Exchange Network Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledg...
Mathoverflow.net news digest
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0 days
Data-driven insights in knot theory
I am collecting examples of theorems and conjectures in knot theory that were originally discovered (or inspired) by computer experiments.Examples include:
Hoste’s conjecture on zeros of the Alexander polynomials of alternating knots (see discussion in Stoimenow paper).... -
0 days
Solution of integral of integral times a function using integration by parts
I am trying to find a simpler solution to the following integral:
$$\int^\infty_{-\infty} \bigg [ \int^\infty_t \frac{dm(R_0)}{dr} \frac{1}{R_0} d\tau \bigg ] m(R_0) dt$$
where: -
15 days
Bounding a complicated sum with variable ceilings and floors in terms of $q$, $x...
I am studying sums that appear in the analysis of exponential sums and need a good big–O bound in terms of $(q, x, H)$. Specifically, let
$$T = \frac{x}{\gamma q} + \frac{m}{\gamma}, \quad 1\le m \le K_8 := \left\lfloor \gamma H - \frac{x}{q} + \frac12\right\rfloor,$$... -
15 years
intuitionistic interpretation of classical logic
Basically intuitionistic logic is classical logic minus the law of the excluded middle, i.e. $\neg A\vee A$ is not necessarily valid for all formulas. So I would take this to mean that classical logic allows one to prove more theorems but apparently...
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Updated: | July 07, 2025 |
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Created: | July 14, 2009 |
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