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www.ethanepperly.com
| | nhigham.com
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| | A norm on $latex \mathbb{C}^{m \times n}$ is unitarily invariant if $LATEX \|UAV\| = \|A\|$ for all unitary $latex U\in\mathbb{C}^{m \times m}$ and $latex V\in\mathbb{C}^{n\times n}$ and for all $latex A\in\mathbb{C}^{m \times n}$. One can restrict the definition to real matrices, though the term unitarily invariant is still typically used. Two widely used matrix norms...
| | blog.georgeshakan.com
4.5 parsecs away

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| | In this post, I talk about the mathematical foundations of PCA
| | nickhar.wordpress.com
1.3 parsecs away

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| | 1. Low-rank approximation of matrices Let $latex {A}&fg=000000$ be an arbitrary $latex {n \times m}&fg=000000$ matrix. We assume $latex {n \leq m}&fg=000000$. We consider the problem of approximating $latex {A}&fg=000000$ by a low-rank matrix. For example, we could seek to find a rank $latex {s}&fg=000000$ matrix $latex {B}&fg=000000$ minimizing $latex { \lVert A - B...
| | blog.martin-graesslin.com
21.2 parsecs away

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| Just the other day a user in IRC complained about a default in KWin. I thought that the default he expected, is the one which is set in KWin sources. So I opened the respective source file and saw ...