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Asked: 2026-05-11T14:22:09+00:00

I want to create a MathML document from an expression tree using Linq to

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I want to create a MathML document from an expression tree using Linq to xml, but I cannot figure out how to use the MathML xml entities (such as ⁡ and &InvisibleTimes): When I try to create directly a XElement using

XElement xe = new XElement('mo', '&InvisibleTimes');

it justs escapes the ampersand (which is no good). I also tried to use XElement.Parse

XElement xe = new XElement.Parse('<mo>&InvisibleTimes</mo>');

but it fails with an System.XmlException: Reference to undeclared entity ‘InvisibleTimes’ How can I declare the entity or ignore the checks?

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1 Answer

  1. As others have pointed out, there is no direct way to do it.

    That said, you can try using the corresponding unicode caracther. According to http://www.w3.org/TR/MathML2/mmlalias.html, for ApplyFunction it is 02061, try new XElement(‘mo’, ‘\u02061’)

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