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《Journal of Chengde Petroleum College》 2008-02
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Derivate of Some Correlation Functions

YIN Jian-hua,WANG Yun-fen(Chengde Teachers'College for Nationlities,Chengde 067000,Hebei,China)  
The derivable nature of function is the main nature that people study in mathematical analysis.The derivable nature about the fuctions of |f(x)|,f 2(x) and f(x) isn't related in general,but in some special case,they are related.The paper studies the derivable relation between the fuctions |f(x)|,f 2(x) and f(x).
【CateGory Index】: O172.1
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