Klein-Beltrami model. Part IV
Coghetto, Roland
A Case Study of Transporting Urysohn’s Lemma from Topology via Open Sets into Topology via Neighborhoods
Coghetto, Roland
Pappus’s Hexagon Theorem in Real Projective Plane
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Duality Notions in Real Projective Plane
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Semiring of Sets
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Some Facts about Trigonometry and Euclidean Geometry
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Groups – Additive Notation
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Summable Family in a Commutative Group
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Chebyshev Distance
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Double Sequences and Iterated Limits in Regular Space
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Klein-Beltrami Model. Part II
Coghetto, Roland
Klein-Beltrami Model. Part I
Coghetto, Roland