Individual #Galois_theory  group theory applied to the solution of algebraic equations
  >part of:  group_theory__grouptheory  the branch of mathematics dealing with groups
     >part of:  pure_mathematics  the branches of mathematics that study and develop the principles of mathematics for their own sake rather than for their immediate usefulness
        >part of:  mathematics__math__maths__math  a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

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