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The Greek word Τεταρτημόριον, lit. ‘fourth part’, was used by Ptolemy to refer to the first part of a circle (a quadrant), for example in his Almagest (Ptolemy 1898, p. 66).

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    2025年

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  • Holger Becker

摘要

The Greek word Τεταρτημόριον, lit. ‘fourth part’, was used by Ptolemy to refer to the first part of a circle (a quadrant), for example in his Almagest (Ptolemy 1898, p. 66).