Which of the following reformulations to mixed integer constraints is not correct? We can model indicator...

 

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Which of the following reformulations to mixed integer constraints is not correct? We can model indicator constraints, for a binary variable z, if z-1, then ax<-b must hold, can be modeled as a x<=b+Mz. We can model the set of x which satisfies ax<-b or ax=b by b+mz<-ax<=b+M(1-2), and z\in(0,1), and m and M two constant lower and upper bounds for a"x-b. O The constraint |x-t can be reformulated by the set of constraints x-y-z and ty+z and y,z>-0 and y<-M k and z<-M(1-k) and k\in(0,1). We can model semi-continuity of a variable x\in 0 or a<x<=b, using a double inequality az<-x<=bz, and z\in [0,1]. Which of the following reformulations to mixed integer constraints is not correct? We can model indicator constraints, for a binary variable z, if z-1, then ax<-b must hold, can be modeled as a x<=b+Mz. We can model the set of x which satisfies ax<-b or ax=b by b+mz<-ax<=b+M(1-2), and z\in(0,1), and m and M two constant lower and upper bounds for a"x-b. O The constraint |x-t can be reformulated by the set of constraints x-y-z and ty+z and y,z>-0 and y<-M k and z<-M(1-k) and k\in(0,1). We can model semi-continuity of a variable x\in 0 or a<x<=b, using a double inequality az<-x<=bz, and z\in [0,1].

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