[Coin-discuss] quadratic integer solver?

[Michal Kaut]

Hello,

what are my options to solve a quadratic mixed integer (binary) problem? 
  (I mean a problem with quadratic elements in the objectives and only 
linear constraints.)

1) calling from AMPL
It looks like the choice is between Bonmin and LaGo - or is there 
anything else?

2) calling from C++ - this is the preferred option, as I will be using 
it inside another alg. I have some experience with using LP solvers via 
OSI, but have never been into NLP problems before. Can I use OSI and 
just add info about which variables have quadratic terms in the 
objective, or do I have to use some completely different interface?


Thanks.


Regards,
Michal Kaut