Why is Tokyo Ghoul's second season called √A?


As the title says, why is Tokyo Ghoul's second season called √A?




**√A ("root A")** is a reference to and pun on the [Aogiri
Tree](http://tokyoghoul.wikia.com/wiki/Aogiri_Tree) organization, which is the
focus of the second season. "A" is simply the first letter of the
organization, and the [root](https://en.wikipedia.org/wiki/Square_root) is a
pun on [tree root](https://en.wikipedia.org/wiki/Root) (since it's the Aogiri
_Tree_ ).




**√A ("root A")** is a reference to and pun on the [Aogiri
Tree](http://tokyoghoul.wikia.com/wiki/Aogiri_Tree) organization, which is the
focus of the second season. "A" is simply the first letter of the
organization, and the [root](https://en.wikipedia.org/wiki/Square_root) is a
pun on [tree root](https://en.wikipedia.org/wiki/Root) (since it's the Aogiri
_Tree_ ).

