In this paper, we address the problem of change in an abstract argumentation
system. We focus on a particular change: the addition of a new argument which
interacts with previous arguments. We study the impact of such an addition on
the outcome of the argumentation system, more particularly on the set of its
extensions. Several properties for this change operation are defined by
comparing the new set of extensions to the initial one, these properties are
called structural when the comparisons are based on set-cardinality or
set-inclusion relations. Several other properties are proposed where
comparisons are based on the status of some particular arguments: the accepted
arguments; these properties refer to the evolution of this status during the
change, e.g., Monotony and Priority to Recency. All these properties may be
more or less desirable according to specific applications. They are studied
under two particular semantics: the grounded and preferred semantics.

本文研究了抽象论证系统中一种特定的添加新论点的变化，探讨了这种变化对于该论证系统中扩展集合的影响，基于集合基数和包含关系定义了几个结构属性，还提出了一些基于特定论点状态变化的属性，研究了这些属性在两种特定语义下的可行性和优越性。