# Klein Four (Northwestern Univ. Acapella Group)

**URL:** <https://forum.kirupa.com/t/klein-four-northwestern-univ-acapella-group/149505>\
**Category:** random\
**Created:** [May 30, 2005, 3:22am UTC](https://forum.kirupa.com/t/klein-four-northwestern-univ-acapella-group/149505 "2005-05-30T03:22:53Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![buckcee](https://avatars.discourse-cdn.com/v4/letter/b/5fc32e/32.png) [@buckcee](https://forum.kirupa.com/u/buckcee)\
**Post date:** [May 30, 2005, 3:22am UTC](https://forum.kirupa.com/t/klein-four-northwestern-univ-acapella-group/149505/1 "2005-05-30T03:22:53Z")

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Hmm, I thought this was a quite clever.

[http://www.math.northwestern.edu/~matt/kleinfour/](http://www.math.northwestern.edu/~matt/kleinfour/)

check out the video