Distinguish the opening direction of visible symbols, with the greater than sign on the left and the less than sign on the right.

The source of the size greater than symbol is usually considered as

In his own book Usage Analysis, he used the symbol ""for the first time, but it was not published until 163 1 year after his death. Therefore, it is generally considered that it was 163 1 year. "greater than sign" and ">" and "less than sign" and "