Simplify the formula for the CDF of the Cauchy distribution.

[WarrenWeckesser]

The Cauchy CDF function may be expressed as atan2(1, -x)/pi.

[mborland]

This looks good to me. Thanks!. The only CI failure is an S390x runner failing to clone (which the CI manager is aware this has been occurring more frequently).

[WarrenWeckesser]

I should have also updated cauchy.qbk. I'll create a new PR to update the CDF "Implementation Notes" section.

Is there a guide or recipe somewhere for how to run quickbook to build the docs?

[mborland]

I should have also updated cauchy.qbk. I'll create a new PR to update the CDF "Implementation Notes" section.

Is there a guide or recipe somewhere for how to run quickbook to build the docs?

There's a synopsis here: https://github.com/boostorg/math?tab=readme-ov-file#building-documentation. In practice you need some pretty old libraries and binaries to make it work so the CI will tell you if something is formatted incorrectly.

[jzmaddock]

There's a synopsis here: https://github.com/boostorg/math?tab=readme-ov-file#building-documentation. In practice you need some pretty old libraries and binaries to make it work so the CI will tell you if something is formatted incorrectly.

The markup is reasonably human readable - so what @mborland says, just commit, and we can always fix it up.

BTW you shouldn't actually need old binaries though - the only thing that is version-fixed is the document DTD - though I confess I haven't updated anything in a good while ;)

[WarrenWeckesser]

There's a synopsis here: ...

Argh, right there in the README file! Not sure how I missed that.

On my Linux machine, I had to install xsltproc (I guess I had all the other dependencies already installed), and I changed darwin to gcc in user-config.jam.

The HTML built successfully, and the change that I made looks OK. For a change like this, do I also commit all the updated HTML files as part of the PR, or should I only submit the change to cauchy.qbk?

[jzmaddock]

Just the .qbk file for the minute, we'll regenerate the docs prior to release (and the CI builds it too). Thanks!

[WarrenWeckesser]

If the only change is in cauchy.qbk, should I used [ci skip] in the commit message?

[jzmaddock]

No might as well let CI build as it checks the docs for validity.