一类二元函数二重极限存在的充要条件

The Sufficient and Necessary Conditions for the Existence of the Double Limits for a Class of Bivariable Functions

应用Cauchy不定式,建立了一类二元函数二重极限存在的充分必要条件,并举例说明了其应用。

Using Cauchy inequality,the sufficient and necessary conditions for the existence of the double limits for a class of bivariable functions were established.Some examples were given to explain its applications.