After some research, i founded (in Wiki) that space after a comma can be avoided using: \setupmathematics[autopunctuation=all]. Sorry for that.
So, only left second question. This is about opentype features, specifically tabular numbers in math mode. This issue (i think) is related to the commercial font that am using, because it have some OT features enabled by default (eg: onum=yes, tnum=no and lnum=no). Curious is that i can only set lnum and onum but not tnum in math. ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________