Geodesic
A~Laplace Ladder of Discrete Laplace Equations
Teoretičeskaâ i matematičeskaâ fizika, Tome 133 (2002) no. 2, pp. 301-310

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We present the notion of a Laplace ladder for a discrete analogue of the Laplace equation. We introduce the adjoint of the discrete Moutard equation and a discrete counterpart of the nonlinear representation for the Goursat equation.
Keywords: Laplace ladder, Toda lattice, discrete KP hierarchies. 
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     author = {M. Nieszposki},
     title = {A~Laplace {Ladder} of {Discrete} {Laplace} {Equations}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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M. Nieszposki. A~Laplace Ladder of Discrete Laplace Equations. Teoretičeskaâ i matematičeskaâ fizika, Tome 133 (2002) no. 2, pp. 301-310. http://geodesic.mathdoc.fr/item/TMF_2002_133_2_a14/