I am looking for a concise expression to find eigenvalues in J (for small matrices)
lapack is not universally available, so I am ignoring it. Here's the best I have been able to find (loosely based on an "At Play With J" article) ev=: 1 {:: [: p.@> [: -&.>/ .(+//.@(*/)&.>) ] <@,"0 -@=@i.@# Is there some way to eliminate the boxing and unboxing here? Thanks, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm