x1 is exactly/approximately 1/e^(x2)-th
of x3 by standard x4, where e is the natural exponential base; x1 is x2 [li; default: 1] e-fold decreases in x3; x1 is a portion of x3 apportioned by a factor of the (x2)-th power of 1/e
imaginary i, comma - spherical coordinates: first coordinate gives magnitude (complex modulus/radius) of the number, the second number gives the angle from the positive real axis measured counterclockwise toward the 'positive' imaginary axis (default: in the primary branch/Arg) as measured in some units (which that number should contain; the contextless default will suppose radians); the angle is not normalized.