Comments on "Artificial neural networks for four-coloring map problems and K-colorability problems"
M. Tateishi, Shinichi Tamura · IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications · 1994
The paper (see ibid., vol 38 p 326-33, 1991) gives a proof that the binary Hopfield neural network using the McCulloch-Pitts binary neuron model converges to the local minimum. In this correspondence the authors present a counter example to the proof and then point out the error in the proof.>