[Bonmin] convexity

[Stefan Vigerske]

Hi,

> I wonder if there is a tool in Bonmin to check if my problem is convex?

Not that I know.
But you said you have only one nonlinear quadratic constraint.
Since it is an equality constraint, it is nonconvex. This is a check I
think also Bonmin does.

> Sorry for the silly question: a MINLP is always nonconvex?

Depends on the definition of convexity ;-).
People often speak of a convex MINLP when the NLP-relaxation obtained by
relaxing all integrality constraints is a convex NLP.

Stefan