Mathematics/Fonts/Blackboard bold

Blackboard bold is probably the most common way of denoting the "standard" number sets: the natural numbers, the integers and so on. In AMS-LaTeX, you use the \mathbb{...} command to obtain them; the ConTeXt way is the \blackboard{...} command. Also, the following commands are defined:

• \setupbodyfont[32pt]
  \naturalnumbers
  \integers
  \rationals
  \reals
  \complexes,
  \primes
  
  \blackboard{F}
  \blackboard{O}
  

• 

See also Doublestroke for an alternative to the msbm font.