Lobachevskiy (crater)
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Nikolai Lobachevsky
Doorways in the Sand
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Culture of Russia
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Joseph Tilly
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Angle of parallelism
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Nikolai
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John Derbyshire
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Hyperbolic motion
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List of Kazan State University rectors
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Hyperbolic angle
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Nikolai Brashman
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Kazan Federal University
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List of minor planets named after people
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Timeline of scientific discoveries
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Eugenio Beltrami
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Spline (mathematics)
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Abstraction (mathematics)
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1856 in science
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1792 in science
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1826 in science
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Hyperbolic space
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Inversive geometry
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Synthetic geometry
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Euclid's Elements
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Hyperbolic geometry
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Kazan
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Axiomatic system
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Foundations of mathematics
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List of geometers
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List of Russian people
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Tatarstan
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Non-Euclidean geometry
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1792
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B-spline
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Mathematical logic
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Hyperbola
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History of geometry
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February 24
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Differential geometry
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December 1
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Carl Friedrich Gauss
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Lobachevsky
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Nikolay Lobaçevski
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Nikolay Ivanovich Lobachevsky
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Lobatchewsky
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Nicolay Lobachevsky
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Nicolai Lobachevsky
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