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I want to enter a GREEK CAPITAL LETTER ALPHA (U+0391) into my LaTeX document. I do not want a LATIN CAPITAL A. How do I do this?

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\symbol{"0391} % hex
\symbol{913}   % dec
\symbol{'1621} % oct

You need a true Unicode TeX engine (XeLaTeX or LuaLaTeX) to get proper glyphs.

Full example code:

\setmainfont{TeX Gyre Termes}


\symbol{"0393} % hex
\symbol{915}   % dec
\symbol{'1623} % oct

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Also possible notation is ^^^^0391. It is preferable for those languages where double qoute is declared to be active symbol. – Igor Kotelnikov Oct 24 '11 at 2:11
@Igor: Sure. If you use XeLaTeX or LuaLaTeX, it is better to use ö directly than \"o, or "o with polyglossia etc. – Leo Liu Oct 24 '11 at 4:50
it depends! ö can be broken if you ocassinally save your file in an encoding different from utf8. – Igor Kotelnikov Oct 25 '11 at 6:02
@Igor: Well, we are talking about Unicode only TeX engines: XeTeX and LuaTeX. You can't get U+0391 in pdfTeX engine directly. Never use an encoding other than UTF-8 in XeTeX and LuaTeX, although possible. – Leo Liu Oct 25 '11 at 6:10

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