On the representation of A_(kk)(2) algebra and A_(kk)(d) algebra

In this paper the representation of $A_{\kk}(2)$ algebra given by Daoud and Kibler [M.Daoud and M.Kibler, J.Phys.A 43 115303 (2010), 45 244036 (2012)] is investigated. It is shown that the new generators are necessary for consistency of the algebra. The multi-mode extension of $A_{\kk}(2)$ algebra, which is called $A_{\kk}(d)$ algebra, is also obtained. The positivity condition of the energy spectrum is also investigated for $A_{\kk}(2)$ algebra and $A_{\kk}(d)$ algebra.