排序方式: 共有26条查询结果,搜索用时 77 毫秒
1.
We study the tangent space at a monomial point M in the Hilbert scheme that parameterizes all ideals with the same Hilbert function as M over an exterior algebra. 相似文献
2.
Vladimir V Topencharov Ketty G Peeva 《Journal of Mathematical Analysis and Applications》1981,84(1):270-281
A new algebraic approach to the problem of equivalence, reduction and minimization of some kinds of fuzzy-automata is given. A system of necessary and sufficient conditions for equivalence of weakly initial fuzzy-automata is formulated. Some algorithms considering the equivalence for two fuzzy-automata are constructed. 相似文献
3.
We prove that Gotzmann's Persistence Theorem holds over every Clements–Lindström ring. We also construct the infinite minimal free resolution of a square-free Borel ideal over such a ring. 相似文献
4.
We consider the Eliahou–Kervaire minimal free resolution of a 0-Borel ideal and its applications. 相似文献
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Ohne Zusammenfassung 相似文献
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We prove Sturmfels' conjecture that toric varieties of codimension two have no other flat deformations than those obtained by Gröbner basis theory. 相似文献
7.
We express the cohomology of the complement of a real subspace arrangement of diagonal linear subspaces in terms of the Betti numbers of a minimal free resolution. This leads to formulas for the cohomology in some cases, and also to a cohomology vanishing theorem valid for all arrangements. 相似文献
8.
The kinetics of accumulation of carbonyl groups in films of polyethylene and polypropylene, subjected to tensile stress during accelerated aging at various temperatures, have been investigated. Stabilized and unstabilized polymers have been used. An inhibition effect at a tensile loading of 20% of the maximum tensile strength was established. 相似文献
9.
Subspace Arrangements Defined by Products of Linear Forms 总被引:1,自引:0,他引:1
The vanishing ideal of an arrangement of linear subspaces ina vector space is considered, and the paper investigates whenthis ideal can be generated by products of linear forms. A combinatorialconstruction (blocker duality) is introduced which yields suchgenerators in cases with a great deal of combinatorial structure,and examples are presented that inspired the work. A constructionis given which produces all elements of this type in the vanishingideal of the arrangement. This leads to an algorithm for decidingif the ideal is generated by products of linear forms. Genericarrangements of points in P2 and lines in P3 are also considered. 相似文献
10.
We obtain local equations for the toric Hilbert scheme, which parametrizes all ideals with the same multigraded Hilbert function as a given toric ideal. We also prove a conjecture of Sturmfels' providing a criterion for an ideal to have such a Hilbert function. 相似文献