Rooney, J - In: Environment and Planning B: Planning and Design 5 (1978) 1, pp. 89-99
This paper compares the three possible types of complex number. These provide a very concise means for representing certain geometric transformations of the points of a plane. The first type considered is the ordinary complex number, <I>a</I> + i<I>b</I> (where i<sup>2</sup> = -1). This is used in the exponential form...</i></i>