I am working through a software tutorial and there are two very ambiguous equations where the variable names are not described (below)

and

mostly just confused about the

 

Source document: http://ansoft-maxwell.narod.ru/en/CompleteMaxwell2D_V15.pdf

Edited October 18, 201510 yr by CasualKilla

 

mostly just confused about the

 

 

Is nu not the refractive index and mu the relative permittivity of the medium of propagation?

Edited October 18, 201510 yr by studiot

Nu is traditionally frequency in electromagnetics.