Nodal analysis consists in writing KCL node equations described above at all nonreference nodes in the circuit. This yields N – 1 linear equation in a like number of unknowns (the node voltages). As discussed in Appendix C, these equations are linearly independent and thus are guaranteed to possess a unique solution. The node voltages may be found by a variety of means, including Gauss elimination, Cramer’s rule, and matrix inversion