doublestroke – Typeset mathematical double stroke symbols

A font based on Com­puter Modern Ro­man use­ful for type­set­ting the math­e­mat­i­cal sym­bols for the nat­u­ral num­bers (N), whole num­bers (Z), ra­tio­nal num­bers (Q), real num­bers (R) and com­plex num­bers (C); cov­er­age in­cludes all Ro­man cap­i­tal let­ters, ‘1’, ‘h’ and ‘k’. The font is avail­able both as METAFONT source and in Adobe Type 1 for­mat, and LaTeX macros for its use are pro­vided.
The fonts ap­pear in the black­board bold sam­pler.