Obviously a fearsome intellect such as yourself would already know that in the context of our discussion those variables are defined. However, I shall humour you.

rho = resistivity

L = length

A = cross sectional area

R = resistance

Just as meaningless as your V/I=R was without similar definition. However, somehow through context I managed to know what you were talking about. Must be luck.

When it comes to forums, some are more equal than others.