... imaginative step to extend the applications beyond linear structural analysis, to non-linear and plastic behaviour, to fluids and g^ses, to dynamics and stability, to thermal and other field ... and y = yi, u must equal Ui, and v must equal Vj. This means that at I, N, must equal 1, and N, and Nk must equal zero. Similarly, at J, Nj= 1, and N, and Nk= 0; and at K, Njc= 1, and Ni and ... the vector transpose {D*}^ being necessary to convert the {D*} vector to a row matrix, thus enabling the actions and displacements to be multiplied and added, and hence to yield...