> cryo shock <mailto:axteffekt@gmail.com>
> 21. Mai 2016 um 17:37
> Hi together,
>
> I've experienced a problem with \blackboard{} command. Please paste 
> the following code and compile it (I have newest CTX beta version 
> (updating daily)):
>
> ------------------------------------------------------------
> \starttext
>
> Variation 1:
> $\forall n \in \blackboard{Z} \neq 0$: should be $0$
>
> Variation 2:
> $\forall n \in \integers \neq 0$: is $0$
>
> \stoptext
> ------------------------------------------------------------
>
> When the first variation is used, CTX seems to convert every folowing 
> letter into blackboard characters within the rest of the math 
> environment no matter where \blackboard brackets are placed.
> Only when the second variation with \integers is used, CTX propely 
> converts every following letter. But imagine you need blackboard G for 
> some reason for example. Then the same bug will appear. I hope this 
> can be fixed easily.
The \blackboard command changes the math alphabet and is used like a 
normal font switch, to limit its scope you have to use it in this form:

     {\blackboard Z}

Wolfgang