We construct two metric tensor fields; by means of these metric tensor fields, sinh-Gordon equation and elliptic sinh-Gordon equation are obtained, which describe pseudospherical surfaces of constant negative Riemann curvature scalar σ = −2, σ = −1, respectively. By employing the Bäcklund transformation, nonlinear superposition formulas of sinh-Gordon equation and elliptic sinh-Gordon equation are derived; various new exact solutions of the equations are obtained.
"On Differential Equations Derived from the Pseudospherical Surfaces." Abstr. Appl. Anal. 2014 (SI67) 1 - 9, 2014. https://doi.org/10.1155/2014/381717