Is this math font available in Latex?

Question

I have opened the pdf in Adobe reader and it shows Times New Roman PSMT as the font, although that may be true for the text font, I am pretty sure the math font is not the same. My guess is the math font is no longer maintained in LaTeX but I would like to be sure. And even if Latex does not support it by default, anybody knows what the math font is?

This is what Adobe says regarding the font

Answer 1

The answer to ”is this math font available in LaTeX“ is no.

But it's worth noting some interesting things: Before Times Roman became the dominant default typeface, many (most?) mathematical texts were set in Monotype Modern 8a because of its extended selection of sorts¹ which enabled not only mathematical typesetting, but typesetting with a variety of scripts such as Greek and Cyrillic. This role was supplanted by Times Roman in the mid twentieth century, particularly in the shift to phototypesetting. This is partly why fonts like Symbol and the Adobe Mathematical Pi fonts match well with Times.

So the text here is almost certainly Monotype Modern 8a, and we can see a close resemblance to Computer Modern. I remember talking with Michael Spivak at the pool during the 1990 TUG conference at Texas A&M and he was quite critical of the deviations from Monotype Modern 8a, which played a major role in him commissioning the development of the MathTime fonts.

As for why you're seeing Times Roman in the document information, it's likely because some bit of additional text (possibly a watermark) is set in it. The actual text you're seeing is a high-resolution bitmap which would become obvious upon doing a close zoom on the text.

---

1. Sorts is the fancy typographic word for characters or what in the digital era we would call glyphs. The phrase “out of sorts” comes from this meaning: when a typesetter ran out of a particular letter, he would be said to be “out of sorts.”²

2. Although like all wonderful etymologies, this is of questionable accuracy. Oh well.

Answer 2

This is only an adapted of my answer of the link below,

An Exquisite Mathematical Font

where you can reproduce (peraphs it is closer to the 60% of the original book), using the XeLaTeX engine:

\documentclass[12pt]{article}
\usepackage{mathtools,amssymb}
\usepackage{mathspec}
\defaultfontfeatures{Mapping=tex-text}
\setallmainfonts{Old Standard}
\DeclareSymbolFont{mathptmxlargesymbols}{OMX}{ztmcm}{m}{n}
\DeclareMathSymbol{\upsumop}{\mathop}{mathptmxlargesymbols}{"50}
\DeclareMathSymbol{\upprodop}{\mathop}{mathptmxlargesymbols}{"51}
\begin{document}
\textsc{Lehmer}: \textit{Asymptotic Evaluation of certain Totient Sums.}
\vskip.5cm
and 
[N=p^{m(an-1)}(p-1)\upsumop_{j=0}^{l}p^{m(n-1)}\Delta \Phi_m\Bigl(\frac{x}{p^{n+j}}\Bigr).]
[
\begin{split}
\lvert N\rvert&  \leqq A_1 \frac{(p-1)}{p^m}x^{mn}\log x \upsumop_{j=0}^{l}p^{m(n-1)} \ldots\
& \leqq A_2 x^{mn}\log x,
\end{split}
]
\end{document}

Answer 3

I played around with Sebastiano's answer and I think I have gotten a little better output so I am posting it here.

\documentclass[12pt]{article}
\usepackage{amsmath,amssymb}
\usepackage{graphicx,,physics}
\usepackage[no-math]{fontspec}
\usepackage{unicode-math}
\setmainfont[FakeBold=2,BoldFont=BaskervilleF-Bold.otf,ItalicFont=ModernMT-ExtendedItalic.otf,BoldItalicFont=ModernMTStd-BoldItalic.otf]{ModernMTStd-Extended.otf}
\setsansfont[%
FakeBold=2,ItalicFont=NewCMSans10-Oblique.otf,BoldFont=NewCMSans10-Bold.otf,BoldItalicFont=NewCMSans10-BoldOblique.otf,
SmallCapsFeatures={Numbers=OldStyle}]{NewCMSans10-Regular.otf}
\setmonofont[%
FakeBold=2,ItalicFont=NewCMMono10-Italic.otf,BoldFont=NewCMMono10-Bold.otf,BoldItalicFont=NewCMMono10-BoldOblique.otf,SmallCapsFeatures={Numbers=OldStyle}]{NewCMMono10-Regular.otf}
\setmathfont[FakeBold=2.5]{NewComputerModern Math}
\setmathfont[range=it,FakeBold=2.5]{Old Standard Italic}
% texgyrepagella-math.otf
\newfontfamily{\stm}{Garamond-Math.otf}
\makeatletter
\RenewDocumentCommand{\sum@}{}{\DOTSB\baskervillesum}
\AtBeginDocument{\RenewDocumentCommand{\sum}{}{\mathop{\sum@}\slimits@}}
\NewDocumentCommand{\baskervillesum}{}{%
    \mathchoice
    {\makebaskervillesum{2.5}}% displaystyle
    {\makebaskervillesum{1.5}}% textstyle
    {\makebaskervillesum{1}}% scriptstyle
    {\makebaskervillesum{0.7}}% scriptscriptstyle
}
\NewDocumentCommand{\makebaskervillesum}{m}{\vcenter{\hbox{\scalebox{#1}{\stm Σ}}}}
\begin{document}
    \textsc{Lehmer}\textit{: Asymptotic Evaluation of certain Totient}
    [N=p^{m(an-1)}(p-1)\sum_{j=0}^{l}p^{m(n-1)}\Delta \Phi_m\Bigl(\frac{x}{p^{n+j}},n,1\Bigr).]
    [
    \begin{split}
        \lvert N\rvert&  \leqq A_1 \frac{(p-1)}{p^m}x^{mn}\log x \sum_{j=0}^{l}p^{m(n-1)} \ldots\
        & \leqq A_2 x^{mn}\log x,
    \end{split}
    ]
\end{document}

Here is what the output looks like. I would say this looks almost 80% similar to the original version, although I cannot get the SmallCaps of Old Standard font to work here even though if I use Old Standard only, I can get the small caps to work