# Anyone know this notation?

**URL:** <https://forum.kirupa.com/t/anyone-know-this-notation/303948>\
**Category:** random\
**Created:** [January 29, 2010, 2:39pm UTC](https://forum.kirupa.com/t/anyone-know-this-notation/303948 "2010-01-29T14:39:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Yeldarb](https://avatars.discourse-cdn.com/v4/letter/y/51bf81/32.png) [@Yeldarb](https://forum.kirupa.com/u/Yeldarb)\
**Post date:** [January 29, 2010, 2:39pm UTC](https://forum.kirupa.com/t/anyone-know-this-notation/303948/1 "2010-01-29T14:39:36Z")

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What is log^2 n?

![](http://www.barbdwyer.com/notation.png)

Is this squared? log(n)\*log(n)  
Or an iterated log? log(log(n))  
Or something else?

I’ve never come across it before.