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I'm trying to write a curly/curvy D and it is not \mathcal{D} or even \mathfrak{D}, rather it seems that it is \mathscr{D} I'm looking for, but then when I do write that it is a very thin capital D. I want a fat curvy one, just as shown in the figure below. Anyone know how to get one like that?

Edit: with fat I mean one which is wide with a lot of white space inside it.

Curly Fat D, not thin!!

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2  
I believe this is the math script D from the MTPro2 fonts. It also has a bold variant if required. –  Paul Gessler Apr 30 at 12:13
    
Could you write that as an answer @PaulGessler? –  Love Learning Apr 30 at 12:17
    
Hahaha they want $149 for that font... –  Love Learning Apr 30 at 12:23
1  
@LoveLearning That's about 'par for the course' for a commercial font: they are non-trivial thing! –  Joseph Wright Apr 30 at 12:38
    
Doesn't matter, it still made me lol. –  Love Learning Apr 30 at 12:43

4 Answers 4

up vote 5 down vote accepted

Expanding my comment into an answer:

The glyph in question is the math script "D" from the MathTime Professional 2 fonts set:

enter image description here

It also has a bold variant if required:

enter image description here

The script font is not available in the free "Lite" version of the fonts, only in the "Complete" version available for purchase. To my knowledge, a similar symbol in a free font does not exist.

If cost is more of a priority than matching the glyph style exactly, you may be interested in reviewing Christian's excellent answer here for more alternative script fonts. Check the "Calligraphic" section of the image posted in his answer.

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Do you know any way to get this curly D without paying $149? I don't mean pirating, rather an alternative way to simply get this D from some other font, or is it registered? –  Love Learning Apr 30 at 12:24
    
@LoveLearning, I have updated my answer with additional information in this regard. –  Paul Gessler Apr 30 at 12:36

If you are willing to use LuaLaTeX:

% arara: lualatex

\documentclass{article}
\usepackage{unicode-math}

\begin{document}
\[\mbfscrD^{(j_1)}_{m^{\phantom{\prime}}_1 m^{\prime}_1}(\mathbf{R})\mbfscrD^{(j_2)}_{m^{\phantom{\prime}}_2 m^{\prime}_2}(\mathbf{R})\]
\setmathfont{xits-math.otf}
\[\mbfscrD^{(j_1)}_{m^{\phantom{\prime}}_1 m^{\prime}_1}(\mathbf{R})\mbfscrD^{(j_2)}_{m^{\phantom{\prime}}_2 m^{\prime}_2}(\mathbf{R})\]
\end{document}

enter image description here

All available symbols of the unicode-math package can be found in its documentation. These are 6 versions of a bold script latin uppercase "D":

enter image description here

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You can have real bold calligraphic fonts thanks to Michael Sharpe's packages: dutchcal makes available Elsevier's calligraphic font, boondox makes available the eponymous font in two forms. Finally bickham makes available Adobe's Bickham Script Pro; this one requires some small work from the user: the font is Opentype and has to be converted to type 1 first, with the LCDF Type Tools and more specifically by cfftot1. As the font, though freely downloadable, remains Adobe's property, so that the conversion has to be done by the user. Let me add that it also has a semi-bold version, and that you can call it either as mathcal/\mathbcal or as \mathscr/\mathbscr if you want to keep using the default \mathcal.

Here is an example of a code that shows how to use them (I comment all \usepackage but one):

        \documentclass[12pt]{article}
        \usepackage[utf8]{inputenc}
        \usepackage[T1]{fontenc}

        \usepackage{dutchcal}
        %\usepackage{boondox-cal}
        %\usepackage{boondox-calo}
        %\usepackage{bickham}

        \begin{document}%

         \[  \mathcal{D}\quad\mathbcal{D} \]%

        \end{document} 

Dutchcal:

enter image description here

Boondox:

enter image description here

Boondoxo:

enter image description here

Bickham:

enter image description here

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To mimic a bold version of \mathscr one option is to use amsbsy package.

\documentclass{article}

\usepackage{mathrsfs}
\usepackage{amsbsy}

\begin{document}
$\mathscr{D}$\par
$\pmb{\mathscr{D}}$
\end{document}

enter image description here

Please note that \pmb is not an actual bold as package documentation suggests:

\pmb: Poor man's bold command, works by typesetting multiple copies of the given argument with small offsets.

Credit.

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Hi thanks for replying @Pouya, but these don't look like the one in the figure :( –  Love Learning Apr 30 at 12:16
    
@LoveLearning, Is you problem with the shape of D or the way it has been made bold? –  Pouya Apr 30 at 12:29
    
The shape is not the same man. Do you know how to get the shape of MTPro2(D) without paying $149 (no pirating)? –  Love Learning Apr 30 at 12:32
    
Are you open to XeLaTeX or LuaLaTeX? –  Pouya Apr 30 at 12:41
    
Ehm, I use LaTeX, –  Love Learning Apr 30 at 12:45

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