maths
i was intrigued to see these dumped fence panels down the little path i cut through to get to the train station in the morning.
i like how the front panel has slipped down and made a nice shape which i'm sure can be described mathematically. but i can't remember what it's called.
yeh - I know the name too but can't remember, I saw it in a book recently describing a roof that was that bendy uppy downy shape... hyper-something I think
it'd probably be an exaggeration to call it a hyperbole