# Meaning of lambda symbol?

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
Staff Emeritus
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 $\Lambda$.