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Nikolai I. Lobachevsky, The Foundations of Geometry: Works on Non-Euclidean Geometry (Minkowski Institute Press, Montreal) ISBN: 978-1-927763-25-4 (ebook) - $5 ISBN: 978-1-927763-24-7 (softcover) - $15 Foreword by Ivan A. Karpenko. Translated from the Russian by Svetla Petkova. Edited (with an Introduction) by V. Petkov. Published on 2 October 2019

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• On the foundations of geometry
• Geometrical investigations on the theory of parallel lines
• Pangeometry

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