O(O(f(n)))是什么意思? [英] What does O(O(f(n))) mean?
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问题描述
我对Big-Oh表示法有所了解.但是我该如何解释O(O(f(n())))是什么意思呢? 这是增长率的增长率吗?
I have the understanding about the Big-Oh notation. But how do I interpret what does O(O(f(n))) mean? Does it mean growth rate of the growth rate?
推荐答案
x = O(n)
基本上表示x <= kn
对于某些常量k
.
x = O(n)
basically means x <= kn
for some constant k
.
因此x = O((O(n))
表示x <= pO(n)
表示某个常量p
,这表示x <= pqn
表示某个常量q
.
Thus x = O((O(n))
means x <= pO(n)
for some constant p
, which means x <= pqn
for some constant q
.
让k = pq
.
然后x = O((O(n)) = O(n)
.
换句话说,O(O(f(n))) = O(f(n))
.
我很好奇,您在哪里看到这种表示法?
I am curious, where did you see such notation being used?
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