Formulas of F-thresholds and F-jumping coefficients on toric rings
Hirose, Daisuke
Kodai Math. J., Tome 32 (2009) no. 1, p. 238-255 / Harvested from Project Euclid
Mustaţă, Takagi and Watanabe define F-thresholds, which are invariants of a pair of ideals in a ring of characteristic p > 0. In their paper, it is proved that F-thresholds are equal to jumping numbers of test ideals on regular local rings. In this note, we give formulas of F-thresholds and F-jumping coefficients on toric rings. By these formulas, we prove that there exists an inequality between F-jumping coefficients and F-thresholds. In particular, we observe a difference between F-pure thresholds and F-thresholds on certain rings. As applications, we give a characterization of regularity for toric rings defined by simplicial cones, and we prove the rationality of F-thresholds on certain rings.
Publié le : 2009-06-15
Classification: 
@article{1245982906,
     author = {Hirose, Daisuke},
     title = {Formulas of F-thresholds and F-jumping coefficients on toric rings},
     journal = {Kodai Math. J.},
     volume = {32},
     number = {1},
     year = {2009},
     pages = { 238-255},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1245982906}
}
Hirose, Daisuke. Formulas of F-thresholds and F-jumping coefficients on toric rings. Kodai Math. J., Tome 32 (2009) no. 1, pp.  238-255. http://gdmltest.u-ga.fr/item/1245982906/