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Thanks for the reference to Dismal Arithmetic, I found it very interesting. By the way, according to Wikipedia, Dismal Arithmetic is now called Lunar Arithmetic

by nyc111 5y ago

Thanks for the reference to Dismal Arithmetic, I found it very interesting. By the way, according to Wikipedia, Dismal Arithmetic is now called Lunar Arithmetic. https://en.m.wikipedia.org/wiki/Lunar_arithmetic https://en.m.wikipedia.org/wiki/Lunar_arithmetic