Why are the symbols of mathematics mostly Greek letters? Up to now, I haven't seen a Chinese character used in mathematical symbols.
Modern mathematics originated in Greece, so there are many Greek letters. Compared with English and Greek, Chinese has congenital defects in mathematics and its combination is not strong. This is also a reason for the poor development of ancient mathematics in China. The study of mathematical symbols is a part of the history of mathematics. If you want to know more, you can read more books on the history of mathematics, and you will find it.