CTAN update: zeckendorf

Jean-François Burnol submitted an update to the
> 
>                 zeckendorf
> 
> package.
> 
> Version: 0.9c 2025-10-17
> License: lppl1.3c
> 
> Summary description: Knuth Fibonacci multiplication, Zeckendorf and Bergman representations of big integers
> 
> Announcement text:
> ----------------------------------------------------------------------
> 
> This adds many new features and has some breaking changes due to
> renamings, not listed here.
> 
> - It is not \xintiieval but \xinteval's syntax which is now
>   extended.
> 
> - Variables phi and psi are defined and one can do algebra with +,
>   -, *, and ^ on them in Q(phi).
> 
> - The Bergman phi-representation is added for elements of
>   Z[phi] in particular for integers.
> 
> - The $ character doing the Knuth Fibonacci multiplication on
>   positive integers now uses the (more efficient) Arnoux formula.
>   The $$ computes out of deference according to the Knuth formula.
> 
> - The PDF documentation section on the mathematical background has
>   been extended and includes bibliographical references.
> 
> - The interactive interface integrates all novelties.
> 
> ----------------------------------------------------------------------
> 
> The package’s Catalogue entry can be viewed at
>     https://ctan.org/pkg/zeckendorf
> 
> The package’s files themselves can be inspected at
>     https://mirrors.ctan.org/macros/generic/zeckendorf/
> 
> ----------------------------------------------------------------------
> 
> Thanks for the upload.
> 
> For the CTAN Team
> Vincent Goulet
> 
> ----------------------------------------------------------------------
> 
> CTAN is run entirely by volunteers and supported by TeX user groups.
> Please join a user group or donate to one, see https://ctan.org/lugs

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