It is shown that for any local strongly F-regular ring there exists natural number e(0) so that if M is any finitely generated maximal Cohen-Macaulay module, then the pushforward of M under the e(0)th iterate of the Frobenius endomorphism contains a free summand. Consequently, the torsion subgroup of the divisor class group of a local strongly F-regular ring is finite.
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Tokyo Inst Technol, Dept Math, 2-12-1 Ookayama, Meguro, Tokyo 1528551, JapanTokyo Inst Technol, Dept Math, 2-12-1 Ookayama, Meguro, Tokyo 1528551, Japan
Shimomoto, Kazuma
Tavanfar, Ehsan
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Inst Res Fundamental Sci IPM, Sch Math, POB 193955746, Tehran, IranTokyo Inst Technol, Dept Math, 2-12-1 Ookayama, Meguro, Tokyo 1528551, Japan
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Nagoya Univ, Grad Sch Math, Chikusa Ku, Furocho, Nagoya, Aichi 4648602, JapanNagoya Univ, Grad Sch Math, Chikusa Ku, Furocho, Nagoya, Aichi 4648602, Japan
Kobayashi, Toshinori
Lyle, Justin
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Univ Kansas, Dept Math, Lawrence, KS 66045 USANagoya Univ, Grad Sch Math, Chikusa Ku, Furocho, Nagoya, Aichi 4648602, Japan
Lyle, Justin
Takahashi, Ryo
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Nagoya Univ, Grad Sch Math, Chikusa Ku, Furocho, Nagoya, Aichi 4648602, Japan
Univ Kansas, Dept Math, Lawrence, KS 66045 USANagoya Univ, Grad Sch Math, Chikusa Ku, Furocho, Nagoya, Aichi 4648602, Japan
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Nara Univ Educ, Takabatake, Nara 6308528, JapanUniv Nebraska, Dept Math, Lincoln, NE 68588 USA
Araya, Tokuji
Iima, Kei-ichiro
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Nara Natl Coll Technol, Dept Liberal Studies, Yamato Koriyama, Nara 6391080, JapanUniv Nebraska, Dept Math, Lincoln, NE 68588 USA
Iima, Kei-ichiro
Takahashi, Ryo
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Univ Nebraska, Dept Math, Lincoln, NE 68588 USA
Shinshu Univ, Fac Sci, Dept Math Sci, Matsumoto, Nagano 3908621, JapanUniv Nebraska, Dept Math, Lincoln, NE 68588 USA