Sean Keel And
نویسنده
چکیده
We show that the log canonical bundle, κ, of M0,n is very ample, show the homogeneous coordinate ring is Koszul, and give a nice set of rank 4 quadratic generators for the homogeneous ideal: The embedding is equivariant for the symmetric group, and the image lies on many Segre embedded copies of P×· · ·×P, permuted by the symmetric group. The homogeneous ideal of M0,n is the sum of the homogeneous ideals of these Segre embeddings. §
منابع مشابه
“Log Abundance Theorem for Threefolds ” by Sean Keel, Kenji Matsuki, and
Dr. Qihong Xie of Tokyo University points out that in Chapter 6 of the paper “Log Abundance Theorem for Threefolds” by Sean Keel, Kenji Matsuki, and James McKernan, Duke Math. J. Vol. 75 No. 1 (1994), 99-119, there are several crucial mistakes and misleading statements. The original manuscripts of the second author, on which the entire Chapter 6 was based upon, did not contain these mistakes, a...
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