# What package does this symbol come from?

What package does this symbol come from? I've tried Detexify without success.

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I think it may be a lowercase xi or uppercase E in some font package – Gareth A. Lloyd Feb 16 '12 at 15:10
\usepackage{calligra} and then \textcalligra{E} – egreg Feb 16 '12 at 15:14
Thanks @egreg, it was being used in a maths context which was sending me in the wrong direction. – Gareth A. Lloyd Feb 16 '12 at 15:27
definitely an uppercase E. the E from calligra is much more heavily sloped than the one shown in the question. the example letter is not from any of the alphabets listed in the comprehensive symbols list (texdoc comprehensive), table 213. it may be a proprietary font. where did the example come from, i.e., in what publication, from what publisher? – barbara beeton Feb 16 '12 at 16:31
@barbarabeeton, from this paper in operations research journal. A non sloped version would be better. – Gareth A. Lloyd Feb 16 '12 at 18:24

the font in question is definitively (a modified) "english script". here is an image showing a sample that includes the E.

the design of "english script" was originally from linotype. the source of the font from which the OP posted the example was bitstream's "English157BT-Regular"; it was modified by unslanting it along with some minor editing. (most "wedding scripts" are much too severely sloped to be suitable for math use. "english script" is one of the more upright scripts, but even it is sub-optimal in its original form.)

i obtained this information from the person responsible for the font system at informs, the publisher of the operations research journal in which the symbol was found.

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\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{calligra}
\begin{document}

\textcalligra{E}

\end{document}


Although possible, the font is not suitable for math scripts. This is the test code for math:

\documentclass{article}
\usepackage[T1]{fontenc}
\DeclareFontFamily{T1}{mcalligra}{}
\DeclareFontShape{T1}{mcalligra}{m}{n}{<-> s * callig15}{}
\DeclareSymbolFont{calligra}{T1}{mcalligra}{m}{n}
\DeclareSymbolFontAlphabet{\mathscr}{calligra}
\begin{document}

$x \in \mathscr{E}$

\end{document}

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calligra does not give the same font – Gareth A. Lloyd Feb 16 '12 at 22:54
@GarethA.Lloyd: Indeed. But it is the most similar font available in a common TeX distribution. I downloaded the PDF and the font is denoted as m4-101, I've no idea about the real font name. – Leo Liu Feb 17 '12 at 1:58