# What font is it that was used in this document?

I was wondering if anyone knows the name of the font used in screenshot below? Thanks in advance! • if you have the pdf you don't need to guess, pdffonts utility or fonts menu of your pdf viewer will list the fonts, see above link Oct 2 at 17:33

This seems to be Palatino, with math from mathpazo. Just to point out: you can also use this font with the more recent (and actively maintained) bundle newpx, although the math font is slightly different (the greek letters differ a bit, for example). \documentclass{article}
\usepackage{amsmath}
\usepackage{mathpazo}
\begin{document}
\setcounter{section}{3}
\setcounter{subsection}{2}
\subsection{The proof of the if''-part of Theorem 3.1}
Suppose that $$f$$ satisfies multiplicative symmetries. Denote by $$\sigma(N)$$ the sum of the positive divisors of $$N$$. By Lemma 3.3, we have
\begin{align*}
& \epsilon_N q^{\sigma(N)} \prod_{\substack{ad=N \\ 0\leq b<d}} \Bigl( f^{(as)} (\zeta_d^b q^{a/d}) - f^{(as)}(r) \Bigr) \\
& = \prod_{\substack{ad=N \\ 0\leq b<d}} \biggl( 1 - \zeta_d^b q^{a/d} f^{(as)}(r) + \sum_{m=2}^\infty H_{m-1}^{(as)} \zeta_d^{bm} q^{am/d} \biggr)
\end{align*}
\end{document}


# It's called Palatino.

I highly recommend to look at: How do I find out what fonts are used in a document/picture? which was suggested in this comment by David Carlisle, but the top answer to that question requires you to have a PDF file with the font in it.

Fortunately, even without the PDF file I was able to recognize this font because I have used it for almost all of my papers, for example here, and here and here.

• I did not look at all links, but in your first manuscript you seem to mix palatine text with computer modern math. Oct 2 at 18:00
• Thanks for pointing that out! I did use palatino in all of those papers, but it's true that for the first paper I also used computer modern for the math-mode parts (still the vast majority of the paper uses palatino). mickep and I had a discussion about this here in case anyone is interested. Oct 2 at 18:35