'⍼' is a symbol included in fonts for mathematical symbols. For example, if you expand the '⍼' included in the mathematical formula / chemical formula font 'Cambria Math', it looks like this. It is a ...

Sufficient conditions are found for the existence of nontrivial invariant subspaces for Toeplitz operators with piecewise continuous symbols. The results are obtained by estimating the norm of the ...

Twitter’s new logo is a Unicode character from a math alphabets subset. The previous logo was refined over more than a decade and heavily regulated online. The “Twitter X” dates back to 2001 as part ...

Twitter on Monday rolled out its new logo and brand: 𝕏. 𝕏 is a Unicode character known as "mathematical double-struck capital X." The new logo is also nearly identical to the lowercase "x" in the ...