14次正规K3曲面上的有理二重点（Ⅰ）

Rational Double Points on a Normal K3 Snrface of Degree 14(Ⅰ)

本文讨论了下面两者的关系：ｉ）八次复射影空间Ｐ￣８中１４次正规ｋ３曲面上的有理二重点所对应的Ｄｙｎｋｉｎ－图；ｉｉ）判别式值为１４、秩为１７的正定偶格．在一定条件下，前者可由后者的Ｄｙｎｋｉｎ－图经过两次连续的基本变换得到．

This paper displays the relation between the Dynkin Graphs of rational double points on a normal K3 surface of degree 14 in p￣8 and positive definite even lattices of rauk 17 with discrim- inant 14.