CVXPY
Minimize
  conj([1. 2.]) @ A @ [1. 2.]
Subject To
Bounds
 0.0 <= A
End
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AFTER COMPILATION
OBJECTIVE
  Sense            : minimize
VARIABLES
  [continuous] <x_0>: obj=1, original bounds=[0,+inf]
  [continuous] <x_1>: obj=2, original bounds=[0,+inf]
  [continuous] <x_2>: obj=2, original bounds=[0,+inf]
  [continuous] <x_3>: obj=4, original bounds=[0,+inf]
END
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SCIP
OBJECTIVE
  Sense            : minimize
VARIABLES
  [continuous] <A_0_0>: obj=1, original bounds=[0,+inf]
  [continuous] <A_0_1>: obj=2, original bounds=[0,+inf]
  [continuous] <A_1_0>: obj=2, original bounds=[0,+inf]
  [continuous] <A_1_1>: obj=4, original bounds=[0,+inf]
END