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Results tagged with co.combinatorics
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user 20516
Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.
3
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3
answers
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measuring $n\ 2$-planes in $\mathbb{R}^{2n}$
Given $n$ vectors $v_1, \ldots, v_n$ in $\mathbb{R}^n$ of course we all know at least one measure for their relative configuration: $|v_1 \wedge\ldots \wedge v_n|$. Now suppose one were given $n$ pair …
- 2,274
1
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When does a subgroup of $\operatorname{GL}(n, \mathbb Q)$ have a bounded fundamental domain ...
After reading the comments, I think the underlying algebraic question is: " if $G=U$ is a unipotent linear algebraic group defined over $\mathbb{Q}$, then is the arithmetic unipotent subgroup $U(\math …
- 2,274