Does anyone know the name of this custom math font?

Question

I was reading through a textbook when, on page 13 (and a few other pages), I found an interesting font for the letter "L" which I have never seen before:

Now, normally I would just use Detexify, but nothing came up when I tried this symbol. There is also a very similar letter "I" a few pages lower that looks like the L without the bottom line (but still with the leading serif on top). I then searched through a few lists of math fonts to see if I could find anything similar. My question is, does anyone recognize this font? I am slightly suspicious that this might not even be written in LaTeX, since the format of the textbook is very custom, and I find it weird that the author would choose to use some custom font when there are certainly suitable alternatives built in.

Welcome to tex.sx. you can follow this answer approach to find what you need. — Diaa, Apr 27 '20 at 20:36
you have the pdf so you can list the exact fonts used in the document. This is a duplicate of this question https://tex.stackexchange.com/questions/45919/how-do-i-find-out-what-fonts-are-used-in-a-document-picture — David Carlisle, Apr 27 '20 at 21:23
According to the pdf file's information, the document's text font is Minion Pro, and its (main) math font is Minion Math. Minion Math is a commercial font. — Mico, Apr 27 '20 at 21:36

score 2 · Answer 1 · answered Apr 28 '20 at 02:26

2

In this case, as Mico posted in the comments, you can use pdffonts or many PDF readers to list the fonts a PDF file uses.

Where that’s not an option, two good tables of font specimens are the List of Symbols Defined by unicode-math for OpenType math fonts, and the mathalpha documentation for legacy math fonts.

answered Apr 28 '20 at 02:26

Davislor

44,045

I not want to use the fontspec :-)...+1 – Sebastiano Apr 28 '20 at 07:10
pdffonts says it's Minion Pro (Math), but I've looked at the glyph list on their website and don't see a similar "L" (see @Sebastiano 's answer). – Nathaniel D. Hoffman Apr 28 '20 at 15:11
1

That’s indeed not on the glyph list for Minion Math 1.026, but it’s in the Minion Pro package. – Davislor Apr 28 '20 at 22:21

score 1 · Answer 2 · answered Apr 27 '20 at 23:00

Here I add a MWE with of the free fonts. It is peraphs a discrete compromise with your Minion Pro (Math).

\documentclass[a4paper,12pt]{article}
\usepackage[T1]{fontenc}
\usepackage{tgpagella}
\usepackage{newpxmath}
\usepackage{parskip}

\begin{document}
Text
\begin{enumerate}
     \item Introduce the following symmetrization operation on tensors $T\in \mathcal{L}_k(V)$:
\[\operatorname{Sym}(T)=\sum^{n}_{\tau\in S_k}{T^{\tau}} \]
\end{enumerate}
after text
\end{document}

You can see the differences with a crop of the your pdf:

Does anyone know the name of this custom math font?

2 Answers2