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stipub / stixfonts

OpenType Unicode fonts for Scientific, Technical, and Mathematical texts
SIL Open Font License 1.1
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Inconsistency between brackets and \llbracket and \rrbracket symbol #230

Closed grivasgervilla closed 2 years ago

grivasgervilla commented 2 years ago

Hi,

first of all, many thanks for this awesome font that I am using to write my PhD thesis. I have working for a while with this font and I have encountered a certain inconsistency between some symbols. Here I show an image of these symbols:

image

The LaTeX code to obtain this output is:

\llbracket p \rrbracket \lbrack p \rbrack

The \llbracket and \rrbracket symbols come from the stmaryrd package. As you can see, the stroke and the height of both symbols (sorry if I am using the wrong terms) do not match. Could it be solved? The corresponding Unicode symbols for \llbracket and \rrbracket are U+27E6 and U+27E7, respectively.

Many thanks for your time.

tiroj commented 2 years ago

That should be fixed in the new v2.20 work we delivered to STI Pub in December, which is currently undergoing testing. We coordinated the heights of all the delimiters in the Math font, including the basic punctuation set that were previously as inherited from the Text font.

grivasgervilla commented 2 years ago

And it seems that the corners of \llbracket and \rrbracket are rounder while \lbracket and \rbracket are not. Is this intended?

On the other hand, when will v2.20 be released? Many thanks for your great work :smile:.

tiroj commented 2 years ago

Oh. Those dblstruck brackets are not STIX Two Math: somehow you are getting fallback to a different font. This is how STIX Two Math displays U+27E6 and U+27E7:

image

I don’t know when v2.20 will be released. That is decided by STI Pub.

grivasgervilla commented 2 years ago

I think that I have found the solution to use the proper symbols for the dblstruck brackets. Previously, I was using the package stmaryrd in order to be able to use the \llbracket and \rrbracket commands to include these symbols, and it seems that this package uses its own symbols for this.

However, I have realized that STIX is one of the LaTeX fonts that supports the unicode-math package (users should love STIX for that :heart_eyes:). Then, you can check the list of unicode-math symbols and find which is the macro of unicode-math for the desired symbol and see whether this is available on the font (STIX in this case or not).

STIX widely supports the unicode-math symbol set, so in this case you only should use the macros \lBrack and rBrack to get these dblstruck brackets without using the stmaryrd package. And then you get the proper STIX dblstruck brackets :smile:.

I will leave this response here in case someone could find it useful for their use of STIX in LaTeX. I close this issue with this comment.

Again, many thanks for your time, and thanks for this awesome project.