Both the number of dimensions and the number of coefficients are arbitrary. Suppose now that the function is two-dimensional, with arguments fa and fb. For all four of the dependent sources described below, the initial condition parameter is described as optional. The program uses this initial condition to obtain the dc operating point of the circuit. After convergence has been obtained, the program continues iterating to obtain the exact value for the controlling variable.
Current flow is from the positive node, through the source, to the negative node.
If specified, ND is the number of dimensions, which must be positive. Are the positive and negative controlling nodes, respectively. One pair of nodes must be specified for each dimension. Pn are the polynomial coefficients. If not specified, 0.0 is assumed.