Labels:screenshot | window | black | square OCR: Figure 12-4: Illustration of the Range of the Natural Logarithm Function The log function, which is the inverse of exp, naturally maps radial lines to horizon- lal lines and circles centered at the origin to vertical lines. The interior of the unit circle is thus mapped to the entire left half-plane, and the exterior of the unit circle is mapped to the right half-plane. The positive real axis is mapped to the entire real axis, and the negative real axia to a horizontal line of height x. The positive and negative imaginary axes are mapped to horizontal lines of height +x/2. The origin is mapped to -go.
