[Guestmodinfo]

We studied it in our peparation for college entrance exams in India. Though the detail the article goes in is exhaustive. But I thought that this maybe common or almost common knowledge. We used to call it sandwich theorem

[thaumasiotes]

The sandwich theorem would normally refer to this one: https://en.wikipedia.org/wiki/Squeeze_theorem

[quietbritishjim]

I immediately thought of the ham sandwich theorem

https://en.wikipedia.org/wiki/Ham_sandwich_theorem