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Results tagged with linear-algebra
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user 26700
Questions about the properties of vector spaces and linear transformations, including linear systems in general.
5
votes
0
answers
231
views
Singularity of an $l\times l$ matrix whose entries are $2l$-th roots of unity
Let $l$ be a positive integer, $\zeta$ be a primitive $2l$-th root of unity in $\mathbb{C}$, and $\alpha,\beta$ be $\pm1$ sequences of length $l$, i.e. $\alpha_k=\pm1,\beta_k=\pm1$ for $k=0,\dots,l-1$ …
- 767
3
votes
0
answers
463
views
An optimization problem over real symmetric matrices
Given an $n\times s$ matrix $P$ of positive real numbers and $T\geq n$, find (either by a formula or an algorithm) the real symmetric $n\times n$ Z-matrix $A$ which maximizes $\min\limits_{1\leq i<j\l …
- 767