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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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I hope everyone is doing well. Let $K \subset \mathbb{R}^n$ be a centrally symmetric convex body $(K = -K)$. Denote by $K \mid H$ the orthogonal projection of $K$ onto $H$, where $H$ is an $n - 1$
Mathoverflow.net news digest
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0 days
Expressing a prime number as a function of the next smallest prime number
19 squared = 17 squared + 11 squared - 7 squared31 squared = 29 squared + 17 squared - 13 squared41 squared = 37 squared = 29 squared - 23 squared
in the same way
187631 squared = 187597 squared + 177209 squared - 177173 squared -
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Does a single degenerate Clifford algebra carry both $\mathfrak{so}$ (inner deri...
In $\mathrm{Cl}(p,q,r)$ (geometric-algebra grading; $r$ = degeneratedirections, $e_0^2=0$) two infinitesimal structures seem to sit side by side intwo different parts of the same algebra.
Rotational symmetry. On the nondegenerate part, the grade-2 elements closeunder the commutator into a Lie algebra $\cong \mathfrak{so}(p,q)$, the Liealgebra of $\mathrm{Spin}$. This genuinely uses the Clifford product(contractions), not just the wedge... -
0 days
Convergence in a tamer Collatz variant
We propose a tamer variant of the $3n + 1$ problem.
For simpler notation we write odd ($m$) for the resulting
odd number when dividing $m$ by $2$ as often as possible. -
0 days
Can I publish a proof in mathematical physics of an existing result that has onl...
I have a proof in mathematical physics for a result that is widely used in the literature for the general $N$-layer case. However, the existing literature only provides a rigorous proof for the $N=2$ case, with the authors simply stating that the generalization...
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