n number of components and the tensor to be decomposed has a negative
% element on its main diagonal. In many other cases, the lambda vector is 
% optional and the symmetric Kruskal decomposition can be represented without
% specifying a lambda vector.
%
% The |symktensor| class stores symmetric Kruskal tensors, and exploits 
% the extra symmetric structure to perform many calculations more 
% efficiently.

%% Declaring a symmetric Kruskal tensor with symktensor
% The |symktensor| format stores the vectors 