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Abstract
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The paper, classically, presents an extended Klein-Gordon field system in 3 1 dimensions with a special Q-ball solution. The Q-ball solution is energetically stable, that is, for any arbitrary small deformation above the background of that, total energy always increases. The general dynamical equations, just for this special Q-ball solution, are reduced to the known versions of a complex nonlinear Klein-Gordon system, as its dominant dynamical equations.
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