Vectorized variables are named inconsistent

[mfeurer]

As far as I understand, the vectorized form of a variable is given by appending v, so $\theta$ becomes $\thetav$, $\alpha$ becomes $\alphav$, and so on. However, for $\lambda$ the pattern is different, and it becomes $\lamv$.

This is a bit confusing, but might be okay. Especially as most lambda's in the LaTeX commands become abbreviated with some sort of lam...

Now there's an argument named $\lambdaopt$ that does not follow that convention.

Therefore, I think we should either rename all variables to use the full lambda, or change lambdaopt to use the abbreviation.

I would suggest the former, as it will result in more readable LaTeX code.