Math & Science ⇒ Russian integral sign

[melekzedek]

I'm trying to find how to get an integral sign the "russian style". The integral russian variant leans to the left and not to the right as the English version. In the following image we have the three variants, from left to right: English, German and Russian variant.



There are some journals that still have this style, e.g. Studia Mathematica. I tried to find some package that has this integral and no success. The lean is in both version, the inline and the display. Does anyone knows how to do this?

[Johannes_B]

I wasn't aware of any differences until today.

I found a paper on Russian Typographical Traditions in Mathematical Literature where this kind of integral sign is mentioned. My first suggestion would have been to consult detexify and the comprehensive symbol list. There I found the german variant from wasysym. I couldn't find the russian integral sign there.
Please also see this question and the commentaries.

Well, wasysym proides the german integral sign. Just mirrowing the (original) sign istn't of much help, as is also seen in the example below. Maybe mathabx could be of interest, too.

Best Regards
Johannes

Code: Select all

\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{wasysym}
\newcommand{\rusint}{%
\scalebox{1}[-1]{\ensuremath{\displaystyle\int}}%
}
\begin{document}
\[ \int \qquad \rusint \qquad \varint \]
\end{document}

[localghost]

There are two more resources that could serve as addition to those mentioned by Johannes.

• »The Comprehensive LaTeX Symbol List«
• »A Survey of Free Math Fonts for TeX and LaTeX«

Thorsten

[cgnieder]

This has been asked a few times on TeX.sx but so far the only answer is: there isn't a font containing it anybody seems to know about. The mathabx package has it for inline math but only an upright one for display math:

Code: Select all

\documentclass{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}  
\usepackage{mathabx}  

\begin{document}
    $\int$
    \[\int\]
\end{document}

integral.png (963 Bytes) Viewed 11926 times

Regards

[melekzedek]

Thank you all for the inputs.

What is strange is that Studia Mathematica http://journals.impan.gov.pl/sm/ uses some type of math that has the symbol, see the image for an example



Maybe the trick is to force the displaystyle integral (i.e. inside \[\]) to behave as the inline integral sign of the mathabx package. Any idea on how to force this?

[Johannes_B]

Hi,

The publisher strongly encourages preparing the manuscript in any version of TeX.

I think the easiest way would just be to ask them how to do it. I am interested in the solution, too.

Tools like pdffonts list the fonts used inside a pdf (Ad0be Reader is also able to do this), but i am afraid there are too many to clearly spot "the right one". See used fonts in pdf files for more information.

[melekzedek]

I'm not sure if the people in the journal will answer emails answering about typeface...
Meanwhile, based on a suggestion of cgnieder, I got a partial solution (it's hugly), here is the code

Code: Select all

\documentclass[11pt]{amsart} 

\newcommand{\rint}[1]{\mbox{\Large $ \int\limits_{\mbox{\tiny  $#1$}}$}}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}  
\usepackage{mathabx} 

\begin{document}

\begin{equation}
\|f\|_{L^p}:= \left (\sum \rint{X} |f(x)|^p \right)
\end{equation}

\end{document}

with the end result



the Large command was used to have the integral sign with equal size to the sum and the limits in the formula is due to the fact that the russian integral always has the domain of integration below the integral sign.
One flaw is that the integral sign is a little bit raised in comparison with the sum sign. I guess it's a partial solution.

Maybe it's possible to improve this piece of code, specially the part of the alignment.Improvements are welcome.