As to the definition of idem after decision which is mainly related with the theory of power of decision, this essay makes out its subjective definition, time definition and objective definition.

• 对于判决后及确定后的一事不再理中的“一事”判定则主要涉及既判力理论,本文拟就判决后及确定后的一事不再理中的“一事”主观界限、时间界限、客观界限作一些界定。