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We study a class of quasi symmetricseventh degree systems and obtain the conditions that its twosingular points can be two centers at the same step by careful computing andstrict proof. In addition, the condition of an isochronous center is also given. In terms of quasi symmetric systems, our work is interestingand obtained conclusions about bicenters are new

The Problem of Bicenter and Isochronicity for a Class of Quasi Symmetric Planar Systems