[larrydag]

I don't see why not. Mixed Integer usually involves ways of setting up the variables for optimization. PDLP appears to use a lot of presovling which I'm sure helps to establish those bounds whether continuous or integer variables.

[cschmidt]

Branch and bound is all about changing the bounds on a given fractional variable and resolving. It wasn't clear whether you could re-start from the previous solution with the new bound and quickly reoptimize.

[pkhuong]

First order methods like PDLP tend to warm start much better than interior point. I'm confident Applegate (of Concorde fame, and who worked on huge MIPs at Google when I was there) is thinking about integration in MIP solvers.

[cschmidt]

Cool, that’s just what I was wondering.