sage: J = ComplexSkewSymmetricEJA(2, field=QQ, orthonormalize=False)
sage: K = QuaternionHermitianEJA(2, field=QQ, orthonormalize=False)
sage: jordan_isom_matrix = matrix.diagonal(QQ,[-1,1,1,1,1,-1])
sage: J = ComplexSkewSymmetricEJA(2, field=QQ, orthonormalize=False)
sage: K = QuaternionHermitianEJA(2, field=QQ, orthonormalize=False)
sage: jordan_isom_matrix = matrix.diagonal(QQ,[-1,1,1,1,1,-1])