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gregorygundersen.com | ||
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www.daniellowengrub.com
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djalil.chafai.net
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| | | | | This post is devoted to few convex and compact sets of matrices that I like. The set \( {\mathcal{C}_n} \) of correlation matrices. A real \( {n\times n} \) matrix \( {C} \) is a correlation matrix when \( {C} \) is symmetric, semidefinite positive, with unit diagonal. This means that \[ C_{ii}=1, \quad C_{ji}=C_{ji},\quad \left\geq0 \] for every \(... | |
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www.ethanepperly.com
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inventingsituations.net
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| | | Suppose you're buildinga widget that performs some simple action, which ends in either success or failure. You decide it needs to succeed 75% of the time before you're willing to release it. You run tentests, and seethat it succeeds exactly 8times. So you ask yourself, is that really good enough? Do you believe the test... | ||
