Is it possible to create an empty constraint? I need that for coding a row-and-column generation algorithm where I need to generate constraints associated to new variables only. Hence, at some point I’ll need to create new empty constraints, which I’ll populate by creating my new variables column-wise. I guess I can do that using a dummy variable … Is there another way?

Answer found in the doc of JuMP

`@constraint(m, con, 0 <= 1)`