Talk:Proximal operator

It seems like at the very top, we mention a general Hilbert space, but in the definition of the proximal operator, we specifically use the 2-norm of an element of that space. Should we drop the '2' subscript of the norm? Or perhaps specify L_2/l_2 space instead of Hilbert space?Nwycoff (talk) 13:57, 30 January 2021 (UTC)