This property defines the Unicodes which belongs to Mathematical Operators block
Characters like ∀,∁,∂, etc. are listed under Mathematical Operators Block.
256 Characters are present in Mathematical Operators Block starting with the Unicode point U+2200 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.