Very nice work Michael, well presented and interesting !! Did you also see Eugene McDonnell’s essays on ‘volutes’ (spirals) in At Play With J (around page 85). Also here … "At Play With J (Edn 2)” paperback <https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB4QFjAAahUKEwj_8fTtm9XHAhUnJKYKHbCgAHY&url=http://www.jsoftware.com/jwiki/At%2520Play%2520With%2520J&ei=8UblVb-1CafImAWwwYKwBw&usg=AFQjCNHOakLes8gaM40T8nrbCX92Brp8cQ>
Note that Joey Tuttle (and Roger Hui) contributed a lot of ideas and a solution to Eugene also, but I think your derivation is actually very elegant !!! (so I copied Joey to verify)…/Regards Rob > On 1 Sep 2015, at 1:09 pm, Michal Wallace <michal.wall...@gmail.com> wrote: > > Hey all, > > I made a 15 minute video about a line of J code I wrote a while back: > > https://www.youtube.com/watch?v=dBC5vnwf6Zw > > -Michal > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm