Help with equations Maxwell derived equations

[CasualKilla]

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, 2015 by CasualKilla

[studiot]

 

mostly just confused about the

 

 

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

Edited October 18, 2015 by studiot

[Klaynos]

Nu is traditionally frequency in electromagnetics.