An algorithm to extrapolate in frequency the matrix coefficients of the IE-MEI method is presented. This results in a total operation count to compute the induced current in electromagnetic scattering problems proportional to the number of unknowns, which in 2D is proportional to the working frequency.
Rius, J., Carpintero, C., Cardama, A., Mosig, J. Frequency extrapolation in the integral equation mei. "Electronics Letters", Desembre 1996, vol. 32, núm. 25, p. 2324-2326.