On Thu, Aug 22, 2019 at 12:33 PM R.E. Boss <[email protected]> wrote: > I still don't grasp what your concept of self-duality is.
Repeating from content buried earlier in this thread: it's https://en.wikipedia.org/wiki/De_Morgan%27s_laws#Generalising_De_Morgan_duality -- and the inverting the logical arguments corresponds to reversing their position in the truth table. So: dual=: $ $ -.@|.@, isSelfDual=: -: dual Thanks, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
