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# sandwich theorem proof pdf

Kummer sandwich theorem of certain elliptic K3 surfaces By Tetsuji Shioda Department of Mathematics, Rikkyo University, 3–34–1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171–8501, Japan (Communicated by Shigefumi Mori, m.j.a.,Oct. 12, 2006) Abstract: It is shown that any elliptic K3 surface with a section and with two II∗-ﬁbres is