单词 | principal diagonal |
释义 | > as lemmasprincipal diagonal principal diagonal n. Mathematics (in a determinant or square matrix) the line of elements running diagonally from the upper left to the lower right corner. ΚΠ 1862 G. Boole in Philos. Trans. (Royal. Soc.) 152 235 It is desirable to employ fixed language in referring to this. We shall therefore call the quantities A1, A2..An the ‘principal elements’, and the diagonal series of terms which they form the ‘principal diagonal’. 1964 N. N. Hancock Matrix Anal. Electr. Machinery ii. 18 A ‘scalar’ matrix is a diagonal matrix in which all the elements on the principal diagonal are equal. 2003 Jrnl. Devel. Econ. 72 347 The coefficients are normalised with a value of one along the principal diagonal of the matrix. < as lemmas |
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