When is a Polynomial Ideal Binomial After an Ambient Automorphism?
When is a Polynomial Ideal Binomial After an Ambient Automorphism?
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环境自同构之后多项式什么时候是理想二项式?
DOI:
10.1007/s10208-018-9405-0
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发表时间:
2018
影响因子:
3
通讯作者:
Miller, Ezra
中科院分区:
文献类型:
--
作者:
Katthän, Lukas;Michałek, Mateusz;Miller, Ezra
Can an idealIin a polynomial ringover a field be moved by a change of coordinates into a position where it is generated by binomialswith, or by unital binomials (i.e., withor 1)? Can a variety be moved into a position where it is toric? By fibering theG-translates ofIover an algebraic groupGacting on affine space, these problems are special cases of questions about a familyof ideals over an arbitrary baseB. The main results in this general setting are algorithms to find the locus of points inBover which the fiber ofis contained in the fiber of a second familyof ideals overB;defines a variety of dimension at leastd;is generated by binomials; oris generated by unital binomials.A faster containment algorithm is also presented when the fibers ofare prime. The big-fiber algorithm is probabilistic but likely faster than known deterministic ones. Applications include the setting where a second groupTacts on affine space, in addition toG, in which case algorithms compute the set ofG-translates ofIwhose stabilizer subgroups inThave maximal dimension; orthat admit a faithful multigrading byof maximal rankr.Even with no ambient group action given, the final application is an algorithm todecide whether a normal projective variety is abstractly toric.All of these loci inBand subsets ofGare constructible.
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DOI:
10.1090/mmono/127
发表时间:
1993-08
期刊:
--
影响因子:
--
作者:
F. Zak
通讯作者:
F. Zak
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
Thomas Kahle;Ezra Miller
通讯作者:
Ezra Miller
DOI:
10.1515/9783110199703.237
发表时间:
2004
期刊:
arXiv: Algebraic Geometry
影响因子:
--
作者:
N. Eriksson;K. Ranestad;B. Sturmfels;S. Sullivant
通讯作者:
S. Sullivant
影响因子:
2.3
作者:
Casanellas, Marta;Fernandez-Sanchez, Jesus
通讯作者:
Fernandez-Sanchez, Jesus
影响因子:
1.6
作者:
Piotr Zwiernik
通讯作者:
Piotr Zwiernik