# New Package PseudoArcLengthContinuation

**URL:** <https://discourse.julialang.org/t/new-package-pseudoarclengthcontinuation/20028>\
**Category:** Package Announcements\
**Tags:** announcement\
**Created:** [January 24, 2019, 10:56am UTC](https://discourse.julialang.org/t/new-package-pseudoarclengthcontinuation/20028 "2019-01-24T10:56:29Z")\
**Posts on this page:** 1\
**Showing post:** 10

<div class="post-metadata">

**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [January 25, 2019, 8:38am UTC](https://discourse.julialang.org/t/new-package-pseudoarclengthcontinuation/20028/10 "2019-01-25T08:38:48Z")

</div>

> [@tkf](#):
>
> I suggest using [`Setfield.Lens`](https://jw3126.github.io/Setfield.jl/latest/index.html#Setfield.Lens) for specifying the bifurcation parameters. It’s a very handy way to make virtually any Julia object “differentiable” using ForwardDiff. Or maybe I can just pull out that part from my code.

I’m not sure what you mean here. Example?

But we should definitely get these two packages setup to take a problem type in, and flesh them out as the options in the bifurcations page. PyDSTool isn’t that great so there’s no reason it should stay front and center in our docs 🙂

---

_[View the full topic](https://discourse.julialang.org/t/new-package-pseudoarclengthcontinuation/20028)._