I second Oscar’s note below. Incidentally, the operation you are talking about is very similar to (although not precisely the same as) Knuth’s arrow notation.
The reference to polygons suggests a variant of Steinhaus-Moser notation, though I think those are pretty similar anyway.
I second Oscar’s note below. Incidentally, the operation you are talking about is very similar to (although not precisely the same as) Knuth’s arrow notation.
The reference to polygons suggests a variant of Steinhaus-Moser notation, though I think those are pretty similar anyway.