NDSolve and "periodic" boundary conditions

*To*: mathgroup at smc.vnet.net*Subject*: [mg124009] NDSolve and "periodic" boundary conditions*From*: gac <g.crlsn at gmail.com>*Date*: Thu, 5 Jan 2012 05:57:49 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Can NDSolve use a "periodic" boundary condition something like: f[0] = f[1]+1 (I know it's not actually periodic) Even better, since I want to solve a PDE, something like: f[0,t] = f[1,t] + I Exp[I t] I can't get around this error: NDSolve::bcedge: Boundary condition... is not specified on a single edge of the boundary of the computational domain. >> I'm trying to solve Eq. (8) of Bowers' and Moody's "Cavity equations for a laser with an injected signal," J. Opt. Soc. Am. B 11:2266 (1994). The boundary condition is the reflected cavity field (periodic) plus the portion of the injected field transmitted into the cavity through the output mirror. Thanks very much. GAC

**Follow-Ups**:**Re: NDSolve and "periodic" boundary conditions***From:*Oliver Ruebenkoenig <ruebenko@wolfram.com>