What does ABC stand for?

The Case [sigma] < 0 The case of the absorbing boundary condition ([sigma] < 0) is more complicated in that the eigenvalues while still real are no longer all positive.

describe the parallel implementation of the three-dimensional Cartesian FDTD method, first introducing such basic concepts as the boundary conditions, near-to-far-field transformation, and enhancements to the FDTD, and later discussing such topics as absorbing boundary condition, singular boundary condition, and simulation technique for the partially symmetric problem.

of Wisconsin-Madison) and contributors explain this critical method for solving Maxwell equations, including the one-dimensional scalar wave equation, numerical dispersion and stability, incident wave source conditions, analytical absorbing boundary conditions, near-to-far field transformations, dispersive, nonlinear and gain materials, grids, bodies of revolution, periodic structures, antennas, photonics, advances in techniques and advances in hardware acceleration for FDTD.