Dear ConTeXt folks, `\dotsb` is not defined although it is defined in AMSTeX (amsmath) [1]. Please find the following minimal example also attached. \starttext This throws an error, since »\backslash dotsb« is not defined. \startformula 1 + 2 + 3 + \dotsb + n = \frac{n}{2} (n + 1) \stopformula \stoptext This is the error. […] system > begin file dotsb.tex at line 1 ! Undefined control sequence. system > tex > error on line 5 in file dotsb.tex: Undefined control sequence ... 1 \starttext 2 This throws an error, since »\backslash dotsb« is not defined. 3 4 \startformula 5 >> 1 + 2 + 3 + \dotsb + n = \frac{n}{2} (n + 1) 6 \stopformula 7 \stoptext 8 l.5 1 + 2 + 3 + \dotsb + n = \frac{n}{2} (n + 1) ? […] Is `\dotsb` not defined intentionally? Thanks, Paul [1] http://en.wikibooks.org/wiki/LaTeX/Mathematics#Introducing_text_and_dots_in_...