对一道习题的探讨

A Discussion about an Exercise

有一道练习题：“证明：若函数连续，且则函数在Ｒ２一致连续。”本文讨论了该练习题的条件和证明。

There is an exercise: 'If function f(x, y) is continuous over R2, and = A . Then function f(x, y) is uniformly continuious over R2 .' In this paper the author has discussed the condition and proof of this exercise.