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I'm writing math notes, and I would like to use the symbol for the letter T that appears in this picture (seen in a TeX.StackExchange post): click

The symbol I want is in the line "Calligraphic: UPRIGHT: euler (Euler script)". How can I load it?

Note that I'm not interested in changing all symbols in my document. I just want to use that T perhaps once in the entire document.

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    Welcome to TeX.SE.
    – Mico
    Commented May 16, 2023 at 23:58

1 Answer 1

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The font you're referring to is Euler Script and is provided by the euscript package.

In it we find

\DeclareMathAlphabet\EuScript{U}{eus}{m}{n}

For a single letter it would be a waste of resources to define a new math alphabet, but we have all the needed data.

\documentclass{article}
\usepackage{amsmath}

\DeclareRobustCommand{\specialT}{\mathord{\text{\usefont{U}{eus}{m}{n}T}}}

\begin{document}

$\specialT$

\end{document}

enter image description here

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  • I wonder if there is a way of doing it by using "\setmathfont{Asana-Math.otf}".
    – user3011
    Commented May 16, 2023 at 22:46
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    @user3011 - It's the same as shown above. I.e., run \usepackage{unicode-math} and \setmathfont{Asana Math}[Scale=MatchLowercase] as usual, and separately run \DeclareRobustCommand{\specialT}{\mathord{\text{\usefont{U}{eus}{m}{n}T}}}.
    – Mico
    Commented May 17, 2023 at 0:10

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