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An analogue of Ptolemy's theorem and its converse in hyperbolic geometry - MaRDI portal

An analogue of Ptolemy's theorem and its converse in hyperbolic geometry (Q2539959)

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An analogue of Ptolemy's theorem and its converse in hyperbolic geometry
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    An analogue of Ptolemy's theorem and its converse in hyperbolic geometry (English)
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    1970
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    foundations of geometry
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