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Results tagged with linear-algebra
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user 524169
Questions about the properties of vector spaces and linear transformations, including linear systems in general.
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Normalizers of the principal congruence subgroups in $\mathrm{GL}(n,\mathbf Q)$
A question quite similar to this question. Let $n \geqslant 3$ and $m \geqslant 2$ be natural numbers and suppose that a matrix $A \in \mathrm{GL}(n,\mathbf Q)$ normalizes the principal congruence sub …
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