On consistency around a $3\times 3\times 3$ cube and Q3 analogue of the lattice Boussinesq equation

Pengyu Sun, Cheng Zhang, Frank Nijhoff

In this paper, we present two new aspects of lattice Boussinesq (BSQ) equations. First, we show that the lattice potential BSQ (lpBSQ) equation defined on a nine-point square latti…