Meaning of lambda symbol?

[peter46464]

Does the lambda symbol \Lambda_{\nu}^{\mu} refer specifically to the Lorentz transformation matrix or to any transformation matrix?
Also, is it essential that it's enclosed in brackets \left(\Lambda_{\nu}^{\mu}\right)
to indicate the entire matrix and not a particular component? Does it matter that much or is it an obvious faux pas?
Thank you

[Fredrik]

I think it's usually just the components of a Lorentz transformation, but you shouldn't assume that every author uses that convention.

I'm not a fan of the (\Lambda^\mu{}_\nu) notation. I assume it denotes the matrix with \Lambda^\mu{}_\nu on row \mu, column \nu? I would just write \Lambda.

Note that in most books, the horizontal positioning of the indices is important.