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I encountered this symbol in an old Adobe mathematical character set, and I'm trying to identify it. I can't find it on Wikipedia's list of mathematical symbols, and it's difficult to describe it for the purposes of a Google search.

Here is an image:

enter image description here

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    And ... What now? What's your question?2011-12-28
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    I've been trying to draw it at http://detexify.kirelabs.org/classify.html but with no luck so far.2011-12-28
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    @Gigili, my question is: what does this symbol mean?2011-12-28
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    This might help: http://detexify.kirelabs.org/classify.html2011-12-28
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    It would possibly be easier if you could provide some context that you have seen this symbol in.2011-12-28
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    Perhaps some context would help?2011-12-28
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    @HenningMakholm, unfortunately I simply found the symbol in an old mathematical character set from Adobe (Universal-GreekMathWithPi). The character set includes Greek letters and various mathematical symbols. This was the only symbol I didn't recognize.2011-12-28
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    Maybe a fancy partial derivative?2011-12-28
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    @Channel72: "Greek" was relevant context.2011-12-28

2 Answers 2

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This looks like U+03D0 GREEK BETA SYMBOL. See the unicode chart containing it.

Apparently it's just a typographical variant of $\beta$ that someone may have used for some particular purpose, like some distinguish $\phi/\varphi$, $\epsilon/\varepsilon$, $\theta/\vartheta$.

See also this mailing list thread. It seems to be unknown whether this symbol ever had any mathematical use.

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    Good eye, @Henning :-)2011-12-28
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According to this PDF, the unicode for this character is 0x3D0, which is The Greek Beta Symbol (an alternate).

Here it is in $\LaTeX$: $\Huge\unicode{x3d0}$.

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    This looks like a _third_ form of beta to me. =)2011-12-30
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    @Srivatsan: $\unicode{x0392}$, $\unicode{x03B2}$, and $\unicode{x03D0}$?2011-12-30
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    Ah, it's my computer's fault. My laptop and desktop machine render the symbol in your answer differently.2011-12-30