One-Parameter Family of Elliptic Sine-Gordon Equations

We introduce a continuous one-parameter family of elliptic sine-Gordon equations (SGE) characterized by the modulus $0\le m\le 1$ of Jacobi elliptic functions and analyze some of its properties and obtain its kink solution for various values of modulus $m$. These elliptic SGE have the novel property that while in the limit $m=0$ they go over to the integrable sine-Gordon equation, in the $m=1$ limit they go over to the integrable sine hyperbolic-Gordon equations (SHGE).