Of course, ^._9 2.19722j3.14159
I gave up too quickly, now it makes sense. Thank you for giving an explanation. Sent from my iPhone > On Oct 3, 2017, at 2:29 AM, Arie Groeneveld <agroeneveld...@gmail.com> wrote: > > > > Op 03-10-17 om 01:15 schreef Jose Mario Quintana: > >> ((_9&^)d.1) >> 2.1972245773362196j3.1415926535897931&*@(_9&^) >> >> (I do not know what to make of that answer anyway.) > > 0j16 ": ^.9 > 2.1972245773362196 > > > 2.1972245773362196j3.1415926535897931 is > ln(9) + i pi > > You will notice that the - sign 'disappeared'. That is due to the rule: > > ln(-n) -> ln(n)+i pi for n a positive integer. > > I get this result from CAS Maxima. > > This means that: > > 2.1972245773362196j3.1415926535897931&*@(_9&^) = - (^.9)*9&^ > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
