Hi Michael, On 04Feb2012, at 7:28 PM, Michael Welsh wrote: > On 5/02/2012, at 12:17 PM, Herbert Schulz wrote: >> >> \newcommand{\N}{$\mathbb{N}$} > > Wouldn't > > \newcommand{\N}{\ensuremath{\mathbb{N}}} be better? Yes! In text mode I can type \N\ and obtain what I want. Don Green Dragon fergdc at Shaw.ca