Index << >>
Beauty and the Beast
*z ←→ (*x)×(cos y)j(sin y) za*zb ←→ * zb × ⍟za
*0 j π ←→ (*0)×(cos π)j(sin π) ←→ 1 × ¯1 j 0 ←→ ¯1
eiπ = ¯1