Identity Matrix -- from Wolfram MathWorld

Identity Matrix -- from Wolfram MathWorld

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日期:2025-04-29
The identity matrix is a the simplest nontrivial diagonal matrix, defined such that I(X)=X (1) for all vectors X. An identity matrix may be denoted 1, I, or E (the latter being an abbreviation for the German term "Einheitsmatrix"; Courant and Hilbert 1989...看更多