>>660
数学記号のこと言ってるなら

https://devforums.apple.com/message/1000934#1000934
> It's not documented yet, but the set of allowed operator characters
> includes 'math' and 'symbol' characters in the Unicode BMP,
> and operator characters can be augmented with combining characters.
> The full set of supported characters will be documented in one of the following seeds.