[NTG-context] \coloneqq
Aditya Mahajan
adityam at umich.edu
Sat Sep 15 08:03:50 CEST 2007
On Fri, 14 Sep 2007, Jesse Alama wrote:
> I'd like to use a colon-equals sign symbol to indicate a definition.
> According to The Comprehensive LaTeX Symbol List, this symbol is
> available in the txfonts (LaTeX) package. However, it seems that the
> txfonts support in ConTeXt doesn't contain that symbol. And, in any
> case, a search for \coloneqq on the wiki gave no results. Perhaps the
> symbol I want isn't called coloneqq in ConTeXt, or perhaps the symbol is
> currently missing. How can I get this symbol in my ConTeXt document?
The symbol is called \colonequals. Other colon symbols are (from
math-ext.tex)
%D \macros
%D {centercolon, colonminus, minuscolon, colonequals, equalscolon,
%D colonapprox, approxcolon, colonsim, simcolon, coloncolon,
%D coloncolonminus, minuscoloncolon, coloncolonequals,
%D equalscoloncolon, coloncolonapprox, approxcoloncolon,
%D colonsim, simcoloncolon}
%D
%D In $a := b$ the colon is not vertically centered with the equal
%D to. Also the distance between colon and equal to is a bit large.
%D So, we define a vertically centered colon \tex {centercolon} and
%D a few macros for colon and double colon relation symbols.
%D
%D \startlines
%D \formula {A \centercolon B}
%D \formula {A \colonminus B}
%D \formula {A \minuscolon B}
%D \formula {A \colonequals B}
%D \formula {A \equalscolon B}
%D \formula {A \colonapprox B}
%D \formula {A \approxcolon B}
%D \formula {A \colonsim B}
%D \formula {A \simcolon B}
%D \formula {A \coloncolon B}
%D \formula {A \coloncolonminus B}
%D \formula {A \minuscoloncolon B}
%D \formula {A \coloncolonequals B}
%D \formula {A \equalscoloncolon B}
%D \formula {A \coloncolonapprox B}
%D \formula {A \approxcoloncolon B}
%D \formula {A \colonsim B}
%D \formula {A \simcoloncolon B}
%D \stoplines
The naming is after colonequals.sty rather than mathtools.sty. I find
these names easier to remember, but if you want mathtools type names,
it is easy to create aliases by \let\coloneqq=\colonequals and so on.
Perhaps it is time to create a comprehensive math symbol list for
ConTeXt also....
Aditya
More information about the ntg-context
mailing list