CVXPY
Minimize
  Sum(m[0:2, 0:2], None, False)
Subject To
Bounds
 0.0 <= m
End
----------------------------------------
AFTER COMPILATION
Minimize
  C0 + C1 + C2 + C3
Subject To
Bounds
End
----------------------------------------
GUROBI
Minimize
  m[0,0] + m[0,1] + m[1,0] + m[1,1]
Subject To
Bounds
End