Question

Explain what
is meant by a hyperbolic line (h-line) in the upper half plane, H

Answer 1

This is "complex" for in here...and I don't like complex stuff.

UHP = z in C | Im z >0)

Then u have two different types of "line", intersection of H with the line perpendicular to the real axis in C and intersection of the circle centred on the real axis in C.

(I think)

Answer 2

Yeah it's degree level. I don't really understand, what does UHP stand for?

Answer 3

Upper half plane