According to my documentation that I copied from the ISO spec, 8○ should be equivalent to: (¯1-R⋆2)⋆0.5 and ¯8○ should be equal to -(¯1-R×2)⋆0.5.
In GNU APL the opposite happens. I.e. ¯8○ returns what 8○ is supposed to return and vice versa. Is my analysis correct? Regards, Elias
