Klein-Beltrami model. Part IV
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A Case Study of Transporting Urysohn’s Lemma from Topology via Open Sets into Topology via Neighborhoods
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Semiring of Sets
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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 I
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Circumcenter, Circumcircle and Centroid of a Triangle
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Altitude, Orthocenter of a Triangle and Triangulation
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Pythagorean Tuning: Pentatonic and Heptatonic Scale
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Homography in ℝℙ
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