New on CTAN: physics3

Mingyu Xia submitted the

                physics3

package.

Version number: 0.1A 2026-01-26
License type: lppl1.3c

Summary description: Modularized package for easy setting of physical formulas

Announcement text:
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- Apart from the legacy `physics` package, this package has solved the abuse of 
tokens: in the legacy `physics` package, if one writes over 32767 (= 2^{15}-1) 
matrix commands (although nobody will do this, but it’s a potential risk), then 
the compiler will crash due to the limitation of memory. Also, the legacy 
`physics` package used a lot of `g`-argument in xparse of the LaTeX kernel, 
which is officially not suggested by the LaTeX team.

- This package also provides a simple way to typeset the inner product (norm) 
and outer product (projector) formulas: \bknorm[<size>, basis]{<operator>}, 
\kbproj[<size>]{<basis>}

- Different from another package, `physics2`, this package has optimized the 
matrix commands: a simple way for inputting a small diagonal matrix (based on 
the smallmatrix environment in `mathtools` package) is provided: \diagmat*{a, b, c}

The star (*) after the `\diagmat` command determines if the output matrix is 
small.


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This package is located at
   https://mirrors.ctan.org/macros/latex/contrib/physics3

More information is at
   https://www.ctan.org/pkg/physics3

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   Thanks for the upload.

     For the CTAN Team
    Erik Braun

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