Advanced Studies in Pure Mathematics
- Adv. Stud. Pure Math.
- Singularities — Niigata–Toyama 2007, J.-P. Brasselet, S. Ishii, T. Suwa and M. Vaquie, eds. (Tokyo: Mathematical Society of Japan, 2009), 187 - 199
Smoothness and jet schemes
This paper shows some criteria for a scheme of finite type over an algebraically closed field to be non-singular in terms of jet schemes. For the base field of characteristic zero, the scheme is non-singular if and only if one of the truncation morphisms of its jet schemes is flat. For the positive characteristic case, we obtain a similar characterization under the reducedness condition on the scheme. We also obtain by a simple discussion that the scheme is non-singular if and only if one of its jet schemes is non-singular.
Received: 26 March 2008
Revised: 20 August 2008
First available in Project Euclid: 28 November 2018
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Ishii, Shihoko. Smoothness and jet schemes. Singularities — Niigata–Toyama 2007, 187--199, Mathematical Society of Japan, Tokyo, Japan, 2009. doi:10.2969/aspm/05610187. https://projecteuclid.org/euclid.aspm/1543448018