You can find more information here: http://www.juliaopt.org/meetings/santiago2019/
The workshop is open for anybody to attend. In particular, we invite new contributors and those who have not met the core development team.
In addition to attending, participants are also invited to submit a proposal for a short (~20-minute) talk. The committee is looking for talks that will start off discussions during the workshop and beyond and for talks that present developments that the community may not be aware of. We encourage speakers to give direct feedback on JuMP.