Here's an an "engineering math terminology" problem that is stumping me, having to do with parallel complex impedances. Perhaps someone can help. In the abstract, for multiplication of complex numbers (Z1 * Z2 = Zm), we have factors (Z1, Z2) and product (Zm). For division of complex numbers (Z1 / Z2 = Zd), we have dividend (Z1), divisor (Z2), and quotient (Zd). For complex impedances in parallel (Z1 || Z2 = Zp), we have, what? What is the correct terminology to use to describe each of the operands in this equation? In orher words, how would you complete these sentences: " Zp is the _________ of Z1 and Z2." " Z1 and Z2 are _______ of Zp " Any input is appreciated.