# Can I incorporate a \unicode-based formula into TeXShop 3.64?

The Mathematica TeXForm command gives me

\text{DifferenceRoot}[\{\unicode{f818},\unicode{f80d}\}\unicode{f4a1}\{(-15
\unicode{f80d}-42) \unicode{f818}(\unicode{f80d})-15
\unicode{f818}(\unicode{f80d}+1)+(15 \unicode{f80d}-3)
\unicode{f818}(\unicode{f80d}+2)-180
\unicode{f80d}-38=0,\unicode{f818}(1)=0,\unicode{f818}(2)=6\}][\alpha ]


But TeXShop reports "783: Undefined control sequence".

Is there a way for me to address this problem?

• The codes are in the Private Use Area, so they're font specific and have no predefined meaning. – egreg Jul 18 '16 at 16:25
• Thanks egreg, but can I get TeXShop to yield a PDF document? Do I have to specify a font? What is the Private Use Area? – Paul B. Slater Jul 18 '16 at 16:58
• Unless you know precisely what font is Mathematica using and you have it, it's impossible to say what the codes refer to. The Private Use Area is a range of Unicode code points that font developer can use for their font, but have no predefined meaning; so in order to get something out of that code the correspondence between (hex) number and symbol must be known. – egreg Jul 18 '16 at 17:03
• For instance, at U+F818 Aboriginal Serif has a “T with tilde”, whereas Ubuntu has a “subscript digit 4”. – egreg Jul 18 '16 at 17:06
• Thanks very much egreg! Wow, quite technical. So--as a practical matter--is there any way I can proceed to get the desired expression into my PDF document? Maybe I should contact Mathematica/Wolfram, and/or post my question on the MathematicaStackExchange website? – Paul B. Slater Jul 18 '16 at 17:17