# Blackboard bold

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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:

• `\naturalnumbers`
• `\integers`
• `\rationals`
• `\reals`
• `\complexes`

as well as `\primes` for blackboard bold P.

See also Doublestroke for an alternative to the msbm font.