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Orthogonal geometry, metric geometry and ordinary geometry
1994In Desarguesian (plane) geometry which takes Hilbert’s axioms of incidence H I, (sharper) axiom of parallels HIV, the axiom of infinity D∞ and Desargues’ axioms D as its basis, one can uniquely determine a Desarguesian number system N, called a geometry-associated Desarguesian number system, as has been exhibited in the previous sections.
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ACM SIGACT News, 1988
Recent solutions of three "art gallery" problems are reported. Three related still-open problems are discussed.
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Recent solutions of three "art gallery" problems are reported. Three related still-open problems are discussed.
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