On solving the equation Ax=b with more variables than equations
E. Zeheb · IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications · 1992
A recently derived mathematical tool is applied directly to solving Ax=b with more variables than equations. This problem arises in the application of interval analysis to circuit design. An arbitrary number of the variables are chosen as parameters, and the complete zero set in the remaining variables multidimensional plane is explicitly determined.>