I would like to express a linear program having a variable that can only be greater or equal than a constant $c$ or equal to $0$. The range $]0; c[$ being unallowed.
Do you know a way to express this constraint in a linear program, in a way that it can be solved using an unmodified simplex implementation ?
For example this constraint : $x_1 \geq 4$ or $x_1 = 0$.
Typical relation between all constraints in a linear program is AND. Here this is an OR between two constraints.
Note : I need to solve problems having multiple variables like this in a computationally efficient way