Chinese Mapped America Before 1430 (Harvard University Archive) Siu-Leung Lee 李兆良 2019.2.10 My research paper presented at the International Cartographic Conference (Washington DC, July 4, 2017), is now available from Harvard University archive, SAO/NASA ADS ...
希腊数字与欧几里得几何 下面用微软的ChatGPT 测试希腊数字计算圆周。 李: Can you show me how to calculate, using Greek numbers, the circumference of a circle with a radius of 40 m? Chat GPT : Certainly! The formula for the circumference of a circle is C = 2πr, where r is the r ...