- 期刊
SIGN CHANGES IN LINEAR COMBINATIONS OF DERIVATIVES AND CONVOLUTIONS OF POLYA FREQUENCY FUNCTIONS
並列摘要
We obtain upper bounds on the number of sign changes of linear combnatlons of derivatives and convolutions of Plya frequency functions using the variation diminishing properties of totally positive functions. These constitute extensions of earlier results of Karlin and Proschan.
延伸閱讀
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