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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
Is the following newly discovered tiling really non-MLD with Penrose P3?
I began my exploration with an observation - that even-vertex tilings can be systematically colored in such way as to generate new non-MLD companion tilings.
Formally, I expressed this in the following theorem:
Theorem: For any even-vertex aperiodic tileset $T$, where there exists a substitution rule S, the transformation $\Phi$ produces a companion aperiodic tileset $T'$.Trivial Outcome: The tile-transition graph is disjoint (reflecting a tile is a choice... -
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What are the best ways to improve bedroom decor on a budget?
Improving bedroom decor on a budget is totally possible if you focus on small but impactful changes instead of a complete makeover.
Start with upgrading your bedsheets and cushions, as they instantly change the overall look of the room. Go for soft, modern designs that match your wall colors. Adding a simple rug, warm lighting, or a few decorative items like candles and wall art... -
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On the explicit expression for the root number for twisted L-functions
I have a puzzle on the explicit expression for the $\varepsilon$-factor $\varepsilon(f\otimes \chi,1/2)$ for the twisted L-function $L( f\otimes \chi,s)$, where $\chi \bmod q$, a primitiveDirichlet character of modulus $q$, and $f\in S^*(q,\chi)$, a...
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0 days
Tastiest Topology Theorems Needing Book Treatments
Soft question!
I've been working on a general topology book that is often veering into the realm of a continuum theory book, where there are lots of big theorems that are hiding away in obscure papers. It's become a bit of sidequest to grab a lot of theorems not currently...
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