⍟
⍟Y: ln Y. Pervasive.
⍟Y
⍟1 ⍝ 0
X⍟Y: logX Y. Pervasive.
X⍟Y
2⍟8 ⍝ 3 10⍟100 ⍝ 2
Uses complex logarithms where needed.
DOMAIN: zero argument, base 1.