> 0x03a3 "$\\sum$" "" ""
See my and Jürgen's reply. > 0xf0c4 "$\\otimes$" "" "" The unicode range of this character is not defined: Range: E000–F8FFThe Private Use Area does not contain any character assignments, consequently no character code charts or namelists are provided for this area.
So every font can map a character of its choice to this code point area. regards Uwe