| 单词 | positive definiteness |
| 释义 | > as lemmaspositive definiteness positive definiteness n. Mathematics the state or condition of being positive definite. ΘΚΠ the world > relative properties > number > mathematical number or quantity > [noun] > particular qualities > signed (positive or negative) minus1579 plus1579 nome1665 negative1706 positive definiteness1941 1941 Econometrica 9 162 The single divergence, due to the presence of the estimated-reproduction-costs functional with a negative sign in the difference, is the positive-definiteness of the functional quadratic form associated with its second derived functional. 1968 L. Fox & D. F. Mayers Computing Methods for Scientists & Engineers i. 6 The associated matrix may be ‘general’, or it may have special properties such as symmetry, with or without positive-definiteness. 1990 Q. Jrnl. Mech. & Appl. Math. 43 605 Using a factorization of the stiffness matrix and of its inverse, the compliance matrix, allows discussion of the constraints implicit in positive definiteness to be couched in a reduced number of parameters. < as lemmas |
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