Abstract
This paper points out that equations (18a) and (18b) in Ref. [7] [Gao Y J 2008 Chin. Phys. B 17 3574] only possess the solutions M = ±ργ̃ε. So, there does not exist the so-called soliton solution family for the Einstein—Maxwell theory with multiple Abelian gauge fields shown in Ref. [7].
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