归结原则可将函数极限问题转化为数列极限问题。本文给出了较弱条件下的归结原则，讨论了归结原则在证明一类常数函数问题中的应用。%The function limit problem can be converted to the limits the number of columns. This paper gives generalization principle under weaker conditions and discusses application of the generalization principle in certify a class of constant function.
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