latex3 - Latex, how to align matrices - TeX - LaTeX Stack Exchange
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Upper Triangular Matrix -- from Wolfram MathWorld
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Quanta Magazine on X: "The textbook method for multiplying two-by-two matrices requires 8 multiplications, plus some additions. Generally, this way of multiplying two n-by-n matrices together requires n³ multiplications along the way.
Latex Matrix - Javatpoint
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