CVXPY
Minimize
  Sum(Vstack(x, y, [[0.00 1.00]
 [2.00 3.00]]), None, False)
Subject To
 15: 1.0 <= x
 20: 1.0 <= y
Bounds
 x free
 y free
End
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AFTER COMPILATION
Minimize
  x_0 + x_1 + x_2 + x_3 + x_4 + x_5
Subject To
 R0: - x_0 <= -1
 R1: - x_1 <= -1
 R2: - x_2 <= -1
 R3: - x_3 <= -1
 R4: - x_4 <= -1
 R5: - x_5 <= -1
Bounds
 x_0 free
 x_1 free
 x_2 free
 x_3 free
 x_4 free
 x_5 free
End
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GUROBI
Minimize
  x[0,0] + x[0,1] + x[1,0] + x[1,1] + y[0,0] + y[0,1] + 6 Constant
Subject To
 15[0,0]: x[0,0] >= 1
 15[0,1]: x[0,1] >= 1
 15[1,0]: x[1,0] >= 1
 15[1,1]: x[1,1] >= 1
 20[0,0]: y[0,0] >= 1
 20[0,1]: y[0,1] >= 1
Bounds
 x[0,0] free
 x[0,1] free
 x[1,0] free
 x[1,1] free
 y[0,0] free
 y[0,1] free
 Constant = 1
End