Double check the upper bound calculation scheme with fixed partitions & Improve

lanl-ansi / Alpine.jl

A Julia/JuMP-based Global Optimization Solver for Non-convex Programs

https://lanl-ansi.github.io/Alpine.jl/latest/

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Double check the upper bound calculation scheme with fixed partitions & Improve #61

Closed jac0320 closed 6 years ago

jac0320 commented 7 years ago

Infeasibility can be seen on some problems and POD can use excessive time to perform the initial UB on some problems.

jac0320 commented 7 years ago

setupperbound()/setlowerbound() can be harmful for Ipopt. should try replace variables with constant

jac0320 commented 6 years ago

@harshangrjn The code has been examined for this issue. So far, no bug has been detected when fixing the local solve's bounds. I also explored a few different ways to fix the bounds, which didn't resolve the difficulties in finding feasible solutions to some hard problems.