Hans Hagen
math-tex defined:
\definemathcommand [integers] {\mfunction{Z}} \definemathcommand [reals] {\mfunction{R}} \definemathcommand [rationals] {\mfunction{Q}} \definemathcommand [naturalnumbers] {\mfunction{N}} \definemathcommand [complexes] {\mfunction{C}} \definemathcommand [primes] {\mfunction{P}}
support for blackboard letters depends on the fonts you use, so math-ams defined:
\definemathcommand [integers] {\blackboard{Z}} \definemathcommand [reals] {\blackboard{R}} \definemathcommand [rationals] {\blackboard{Q}} \definemathcommand [naturalnumbers] {\blackboard{N}} \definemathcommand [complexes] {\blackboard{C}} \definemathcommand [primes] {\blackboard{P}}
so .. if you use the ams fonts, $\integers$ and $\rationals$ should work
I went grepping around for the commands that you and Giuseppe Bilotta refer to, but I couldn't find them. Perhaps my context version is too old? ecashin@marblerye tmp$ texexec --version TeXExec 1.9 - ConTeXt / PRAGMA ADE 1997-2000 -- --Ed L Cashin | PGP public key: ecashin@uga.edu | http://noserose.net/e/pgp/