This property defines the Unicodes which belongs to Supplemental Mathematical Operators block
Characters like ⨀,⨁,⨂, etc. are listed under Supplemental Mathematical Operators Block.
256 Characters are present in Supplemental Mathematical Operators Block starting with the Unicode point U+2A00 that represents the character ⨀.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.