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zhishifufei_php/vendor/phpoffice/math/docs/index.md

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#
Math is a library written in pure PHP that provides a set of classes to manipulate different formula file formats, i.e. [MathML](https://en.wikipedia.org/wiki/MathML) and [Office MathML (OOML)](https://en.wikipedia.org/wiki/Office_Open_XML_file_formats#Office_MathML_(OMML)).
Math is an open source project licensed under the terms of [MIT](https://github.com/PHPOffice/Math/blob/master/LICENCE). Math is aimed to be a high quality software product by incorporating [continuous integration and unit testing](https://github.com/PHPOffice/Math/actions/workflows/php.yml). You can learn more about Math by reading this Developers'Documentation and the [API Documentation](http://phpoffice.github.io/Math/docs/develop/)
## Features
- Insert elements:
* Basic :
* Identifier : <math display="inline"><mi>a</mi></math>
* Operator : <math display="inline"><mo>+</mo></math>
* Numeric : <math display="inline"><mn>2</mn></math>
* Simple :
* Fraction : <math display="inline"><mfrac><mi>a</mi><mn>3</mn></mfrac></math>
* Superscript : <math display="inline"><msup><mi>a</mi><mn>3</mn></msup></math>
* Architectural :
* Row
* Semantics
## Support
### Readers
| Features | | MathML | Office MathML |
|---------------------------|----------------------|:----------------:|:----------------:|
| **Basic** | Identifier | :material-check: | :material-check: |
| | Operator | :material-check: | :material-check: |
| | Numeric | :material-check: | :material-check: |
| **Simple** | Fraction | :material-check: | :material-check: |
| | Superscript | :material-check: | |
| **Architectural** | Row | :material-check: | |
| | Semantics | :material-check: | |
### Writers
| Features | | MathML | Office MathML |
|---------------------------|----------------------|:----------------:|:----------------:|
| **Basic** | Identifier | :material-check: | :material-check: |
| | Operator | :material-check: | :material-check: |
| | Numeric | :material-check: | :material-check: |
| **Simple** | Fraction | :material-check: | :material-check: |
| | Superscript | :material-check: | |
| **Architectural** | Row | :material-check: | :material-check: |
| | Semantics | | |
## Contributing
We welcome everyone to contribute to Math. Below are some of the things that you can do to contribute:
- [Fork us](https://github.com/PHPOffice/Math/fork) and [request a pull](https://github.com/PHPOffice/Math/pulls) to the [master](https://github.com/PHPOffice/Math/tree/master) branch
- Submit [bug reports or feature requests](https://github.com/PHPOffice/Math/issues) to GitHub
- Follow [@PHPOffice](https://twitter.com/PHPOffice) on Twitter