Angle of parallelism

In hyperbolic geometry, the angle of parallelism $\Pi(a)$ , is the angle at one vertex of a right hyperbolic triangle that has two asymptotic parallel sides. The angle depends on the segment length a between the right angle and the vertex of the angle of parallelism.

单词	Angle of parallelism
释义	Angle of parallelism 英语百科 Angle of parallelism In hyperbolic geometry, the angle of parallelism $\Pi(a)$ , is the angle at one vertex of a right hyperbolic triangle that has two asymptotic parallel sides. The angle depends on the segment length a between the right angle and the vertex of the angle of parallelism.
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