[FlopCpp] Availability of warm starts and examples

[Simone Zaccaria]

Dear Ted,

Thank you for your answer! I opened a corresponding issue on the GitHub repository.

Best
--
Simone Zaccaria
Postdoctoral Research Associate
Raphael Lab, Computer Science Department
Princeton University
Princeton, NJ 08540

> On Mar 15, 2019, at 3:58 PM, Ted Ralphs <ted at lehigh.edu> wrote:
> 
> Hi Simone,
> 
> I'm the nominal maintainer of FlopC++, although I did not write it and haven't used it extensively. The original I sort of inherited maintenance of it by default and have been fixing things here and there. As far as I know, FlopC++ does not support warm-starting, but I guess it shouldn't be very difficult to add. I can try to take a look, but to keep track of your request, could you open an issue on the GitHub page for the project:
> 
> https://github.com/coin-or/FlopCpp <https://github.com/coin-or/FlopCpp>
> 
> We're in the process of migrating over to Github, but we'll deal with issues there going forward.
> 
> Cheers,
> 
> Ted
> 
> On Fri, Mar 15, 2019 at 2:52 PM Simone Zaccaria <zaccaria at princeton.edu <mailto:zaccaria at princeton.edu>> wrote:
> Dear authors,
> 
> We have a C++11 program, designed in my research lab at Princeton University, which is currently using Gurobi to solve several MILP formulations in parallel. Now, I need to replace Gurobi with an open-source MILP solver with less restrictive license options, available also for non-commercial research entities other than universities. I explored several options (GLPK, Coin-OR CBC, SCIP...) but I need to maintain the simplicity of the Gurobi interface (an algebraic like interface).
> 
> As such, I am looking for an open source C++11 modeling language or MILP solver with a C++11 API with the following 2 requirements:
> 1. Algebraic-like style of programming (e.g. add_constraint(x1 + x2 >= x3))
> 2. Possibility to specify WARM STARTS (also called, hot starts, MIP starts, or initial solutions) which are basically an initial solution for the variables where to start the optimization
> Your FLOC++ package seems a very good option for this, however I was not able to understand whether condition 2. is met. Also I would like to know if there are some available examples.
> 
> Thank you,
> Best regards
> --
> Simone Zaccaria
> Postdoctoral Research Associate
> Raphael Lab, Computer Science Department
> Princeton University
> Princeton, NJ 08540
> 
> 
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> 
> -- 
> Dr. Ted Ralphs
> Professor, Industrial and Systems Engineering
> Lehigh University
> (610) 628-1280
> ted 'at' lehigh 'dot' edu
> coral.ie.lehigh.edu/~ted <http://coral.ie.lehigh.edu/~ted>

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