I asked this question almost three years ago, when I was first starting. Almost the same people answered it, and quite at length, too!
If you want some explanations on the options of composing using the 'cap' ([:) or the compose (@) you can look here: http://jsoftware.com/pipermail/programming/2010-February/<http://jsoftware.com/pipermail/programming/2010-February/018214.html> search using "composing without forking (% +/ %)" Unfortunately it is not too easy to search old mails. It is probably also worth understanding the "under" verb, and why resistances in parallel are the same concept as "sumation *under* inversion" , given by (+/ &.: %) The differences between @ and @:, and also between &. and &.: have to do with rank, I leave their explanation, should you need it, to those more elegant than I ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
