\ell
corresponds to
Is there a symbol corresponding to uppercase \ell
?
You can use either the amssymb
package or the mathrsfs
package.
If you decide to use amssymb
use this to typeset a "curly" L:
\mathcal{L}
If you decide to use mathrsfs
, you use:
\mathscr{L}
Regardless of your choice, I recommend that you include
\newcommand{\Lagr}{\mathcal{L}}
In your preamble, so that you can easily switch all instances of the curly L if you decide you don't like the one you chose.
$\mathcal{L}$
perhaps?\ell
is to use that letter rather than the (easily) indistinguishable lowercasel
. In the case of the uppercaseL
there's no confussion so there's no need to use a different glyph. You might be looking for the\mathcal
or\mathscr
alphabets, but I just wanted to point that out. If you are writting a normal uppercase ell, there's no need for a special glyph like there is for the lowercase one.