3

I'm looking for a symbol from this equation (for buffer capacity of solution):

enter image description here

It looks like a capital beta to me or a capital Eszett letter from the German alphabet. However, to my knowledge, the capital beta should look like "B" and there is no German word starting with Eszett. This symbol is definitely not beta, since it's also used in a different equation: enter image description here

Please, help to identify.

P.S. If needed: article with equations is Understanding, deriving and Computing Buffer Capacity by Edward T. Urbansky and Michael R. Schock

Update 1: As suggested in comments: I added \usepackage{mathrsfs} and called \mathscr{B} Result is :

enter image description here

Close, but not exactly what I need.

Close enough solution:

\documentclass{article}
\usepackage[utf8]{inputenc}
% here as scr use either: rsfso, boondoxo
% no luck using mathpi ((
\usepackage[scr=rsfso]{mathalpha}

\begin{document}


\begin{equation}
   \mathscr{B}
\end{equation}
\end{document}
Araneus0390
  • 157
  • 1
    try \mathscr{B}... though you need a math font with the \mathscr variant defined. (E.g. \usepackage{mathrsfs}.) – Willie Wong Apr 30 '21 at 15:07
  • @WillieWong Tried, see updates in post. Close, but not close enough. – Araneus0390 Apr 30 '21 at 15:17
  • Looking at the documentation of the mathalfa package it's quite close to the calligraphic letters of the mathpi font, but that's a comercial font. – campa Apr 30 '21 at 15:20

3 Answers3

6

If you are using pdflatex, you can apply an unslant to the character (Shear transform a "box").

\documentclass{article}
\newsavebox{\foobox}
\newcommand{\slantbox}[2][\slantvalue]{\mbox{%
        \sbox{\foobox}{#2}%
        \hskip\wd\foobox
        \pdfsave
        \pdfsetmatrix{1 0 #1 1}%
        \llap{\usebox{\foobox}}%
        \pdfrestore
}}
\usepackage{mathrsfs}
\newcommand\mathscrup[2][-.4]{\mkern2mu
 \slantbox[#1]{$\mathscr{#2}$}\mkern-2mu}
\begin{document}
$\mathscr{B}$ normal

$\mathscrup{B}$ unslanted


$x\mathscrup{BL}x$
\end{document}

enter image description here

Steven B. Segletes
  • 237,551
4

It seems to be a B from Mathpi script. However, as pointed out by @WillieWong, this font is commercial.

However, the B from the upright version of Boondox script seems to be a very close approximation.

\documentclass{article}
\usepackage[scr=boondoxupr]{mathalpha}
\begin{document}
\( \mathscr{B} \)
\end{document}

In case you can access the Mathpi font, the last example should output the exact same B as in your example if you replace the option boondoxupr with mathpi.

Vincent
  • 20,157
2

The specific version that your screen cap shows is most likely from the commercial Adobe Mathematical Pi collection of fonts.

If you don't have it, and want something that looks more upright than the rsfs version, try rsfso.

Willie Wong
  • 24,733
  • 8
  • 74
  • 106