You can help by adding missing items. Web mathematical alphanumeric symbols is a unicode block comprising styled forms of latin and greek letters and decimal digits that enable mathematicians to denote different notions with different letter. Using letters allows us to represent quantities that could change or that we don't know the value of yet. Web upper case letter lower case letter greek letter name english equivalent letter name. (january 2011) latin and greek letters are used in mathematics, science, engineering, and.