3
votes
2answers
624 views

How is「第3位を四捨五入」deconstructed to mean “round up to 2 decimal places”?

小数第2位未満に端数が生じた場合は、小数第3位を四捨五入する I initially translated this sentence to: If a fraction with less than 2 decimal places is generated, round off to 3 decimal places. So: 2.1 ≈ 2.100 It felt ...
5
votes
1answer
204 views

Why is topology called 位相幾何学?

Topology in English is called 位相幾何学 in Japanese; also, topological space is called 位相空間. But why is topology called 位相幾何学? What is the correspondence between topo and 位相? What is the origin of 位相?