部分几何满足Pasch公理的充要条件

A Necessary and Sufficient Condition for a Partial Geometry to Satisfy Pasch's Axiom

为研究将一部分几何〔１〕嵌入射影空间这一问题，文〔１〕给出了α（ｌ，ｈ）和ａ（ｌ，ｈ）的关系引理．现对此引理提出商榷意见。

In order to embed a partial geometry in a projective space,paper 1 proved a lemma about the relation between α(l,h) and a(l,h) .This paper presents a discussion on this lemma,and give a correct conclusion.