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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 $$\lVert(a_{ij})\rVert \le C \Bigl\lVert\s...
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"Combining" Tate-Nakayama duality and Poincaré duality
Let $U$ be an open of an smooth projective geometrically connected curve over $k$ a $p$-adic field, $\mathcal{F}$ a finite group scheme over $U$. In this paper, Harari writes that "combining Poincaré duality and Tate-Nakayama local duality", one can...
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Asymptotic for fourth moment of derivatives of Riemann zeta function
Due to work of Ingham, it is known that$$\int_1^T|\zeta^{(m)}(1/2+it)|^2\;dt\sim\frac{1}{2m+1}T(\log T)^{2m+1}.$$Is there a similar result for the fourth moment? That is, is there an explicit result of the form$$\int_1^T|\zeta^{(m)}(1/2+it)|^4\;dt\sim...
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Transform a Maurer-Cartan formal solution into a convergent one
I am looking to the Bogomolov-Tian-Todorov theorem for Calabi-Yau manifolds. For any compact Kahler manifold $X$ with trivial canonical bundle ($K_X\simeq \mathcal{O}_X$) this theorem ensure that its Kuranishi space associated to its versal family of...
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Haar integral of function in $L^1(b\mathbb R)$ and mean value
Let $\mathrm b\mathbb R$ denote the Bohr compactification of $\mathbb R$, let $\mu$ be its normalized Haar measure, and let $\iota:\mathbb R\to\mathrm b\mathbb R$ be the usual embedding of $\mathbb R$ as a dense subset of $\mathrm b\mathbb R$. If I have...
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