Open Mathematics (Mar 2020)
The hyperbolic polygons of type (ϵ, n) and Möbius transformations
Abstract
An n-sided hyperbolic polygon of type (ϵ, n) is a hyperbolic polygon with ordered interior angles π2$\begin{array}{} \frac{\pi}{2} \end{array} $ + ϵ, θ1, θ2, …, θn−2, π2$\begin{array}{} \frac{\pi}{2} \end{array} $ − ϵ, where 0 < ϵ < π2$\begin{array}{} \frac{\pi}{2} \end{array} $ and 0 < θi < π satisfying
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