摘要
讨论了Steiner列的结构 ,得到了Steiner扩张的一些性质 ,并推出每个Steiner列 {sn}中 ,任意圆是可以尺规作出的。
The structure of Steiner serial and some properties of Steiner extension were discussed.A conclusion that every circle in Steiner serial was constructible with straight-edge and compass was obtained.