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Identity Matrix -- from Wolfram MathWorld
瀏覽：1014
日期：2026-04-17
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
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