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[en] A new and efficient way is presented for discrete integrable couplings with the help of two semi-direct sum Lie algebras. As its applications, two discrete integrable couplings associated with the lattice equation are worked out. The approach can be used to study other discrete integrable couplings of the discrete hierarchies of solition equations
Journal
Communications in Theoretical Physics; ISSN 0253-6102; 
; v. 49(5); p. 1114-1118
; v. 49(5); p. 1114-1118