摘要
设S＝（P，L）是点正则的阶为t≥2的空间，即为过每点有t＋1条线的线性空间，|P|＝v＝t2＋t,L＝b＝v＋1，并设|Vi－Vi|≤1，max{V1……Vb,}＝t＋1，则线性空间S必为穿孔的射影平面；反之，t≥2阶射影平面的穿孔必为点正则的阶为t的线性空间，而且|P|＝v＝t2＋t，|L|＝v＋1，|vi－vj|≤1。
Let S = (P. L) be a finite linear space with V points and blines.Then, S is a punctured projective plane with the order of t>2, if and only if S is pointregular with an order t>2, |p|=v=t2+t, |L|=b=v+1, |vi－vj|<1 (i,j= 1, 2,... b)and max{v1,v2..vb} =t+1.
