论文标题
（预）订单的子空间的一些代数和拓扑特性
Some algebraic and topological properties of subspaces of (pre)orders
论文作者
论文摘要
我们研究了一个组上预订子集的代数和拓扑特性。特别是我们研究了两个预订的组成的特性，在标准订单的情况下概括了\ cite {s}的拓扑定理，并在标准预订的情况下显示相同的定理。我们还展示了标准估值的属性。
We study algebraic and topological properties of subsets of preorders on a group. In particular we study properties of the composition of two preorders, generalize a topological theorem of \cite{S} in the case of standard orders and show the same theorem in the case of standard preorders. We also show a property of standard valuations.
