I already tried to use Detexify but the closest suggestion was \mathfrak{Y}. I'm sure that it is not the case.
Does anybody have idea how to produce the letter used for the space cited on the image?
[Tex/LaTex] the font
symbols
Related Solutions
EDIT
In relation to your edit use xspace
\documentclass{article}
\usepackage{pifont,xspace}
\newcommand{\cross}{\ding{55}\xspace}
\begin{document}
\cross a
\cross. a
\cross . a
\end{document}
Why don't you get any space?
This works well:
\documentclass{article}
\usepackage{pifont}
\begin{document}
\ding{55} a
\ding{55}. a
\ding{55} . a
\end{document}
You can identify the font from some characters using the WhatTheFont! web service. There you can simply upload an image of the text and the service tries to find the font for you. Sometimes you have to identify the letters in the image manually.
You can then have a look at the LaTeX Font Catalogue if the font is available. The alphabetic list of all fonts is most useful here.
For your image above I got:
Brush Script MT
from Monotype Imaging Brush Script
The 'SK' from this font is:
http://origin.myfonts.net/114/fs/u/62/70f93c330eef4c8709da2f5d74c97e.gif
On the font catalogue I then found: http://www.tug.dk/FontCatalogue/brushscriptx/
which states:
Usage
\usepackage[T1]{fontenc}
\usepackage{pbsi}
Style examples
\bsifamily
Because this is not a math font you need, \bsifamily does not work in math mode directly. You need to switch to text mode locally, i.e. using \mbox. However, I strongly recommend to use \text from amsmath, so that you get the correct size for sub- and superscripts etc. Finally you should add \mathord to get the correct spacing.
\documentclass{article}
\usepackage{amsmath}
\usepackage[T1]{fontenc}
\usepackage{pbsi}
\newcommand\mathbsi[1]{%
\mathord{\text{\bsifamily #1}}%
}
\begin{document}
$ \mathbsi{K} = \mathbsi{S} + 1 $
\[ \mathbsi{K} = \mathbsi{S} + 1 \]
$ X_{\mathbsi{K}_{\mathbsi{S}}} = Y^{\mathbsi{S}} $
\end{document}
Best Answer
It certainly looks like a
\mathfrak{Y}, for instance fromesstixfonts (seemathalfa).