Elementary Synthetic Geometry (Classic Reprint) - Softcover

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Excerpt from Elementary Synthetic Geometry

I have at last mustered courage to put my Pure Spherics where it belongs. But as my first book is geometry with one parallel geodesic, my second book geometry with no parallel geodesic, my third book should be geometry with more than one parallel geodesic through the same point (the Lobat schewsky-bolyai elementary geometry). So it shall be, if, after another decade, I write still another geometry.

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