Importing a single letter from Euler cursive font

Question

Using the standart Computer Modern font how can I redefine the letter "l" (which looks like a 1 "one" ) with a different more curly font but keep the math font otherwise unchanged?

\documentclass[12pt,a4paper]{report}
\usepackage{amsmath, amssymb, amsfonts}
\begin{document}
$ Y_m^l $
\end{document}

Desired outcome:

Ive done lots of research and there is the same question here Importing a Single Symbol From a Different Font but my latex knowledge is not sufficient to tackle the code the desired way.

In the User's Guide to AMSFonts Version 2.2d the curly letter "l" is given in Appendix D, page 32 and the font is given as

Euler cursive (roman) medium weight {eurm10}

In Hartke´s A Survey of Free Math Fonts for LaTeX the letter of interest is also listed in Figure 1, page 4 under the caption

Fig.1: Computer Modern (using the Blue Sky and Y&Y Type 1 fonts; no package necessary)

So I wonder whether there is any easy way to switch to that curly "l" letter. Or if the letter has to be separately redefined.

Answer 1

the symbol you are looking for is \ell, which is included in the basic computer modern font.

it can be found using detexify, as suggested in the question How to look up a symbol or identify a math alphabet?.

detexify found it when i tried, even with my execrable handwriting.