Addendum: I just bumped into Morten Høgholm's bachelor's thesis. "Automatic line-breaking of displayed math expressions" https://sites.google.com/site/mortenhoegholm/breqn-thesis.pdf
That thesis contains a conceptual explanation of the breqn algorithm (or at least the algorithm he used when reimplementing breqn as l3breqn). Might be useful if/when somebody decides to have a go at improving ConTeXts math breaking. The thesis also contains the code of l3breqn, but that is rather more sparsely commented than the code in the breqn.pdf manual. --Sietse ___________________________________________________________________________________ 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 ___________________________________________________________________________________