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arXiv math-ph/0004032math-phmath.MP
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Z_3分次外微分与高阶规范理论

Z_3-graded exterior differential calculus and gauge theories of higher order

R. Kerner

摘要:

我们给出了外微分的一个可能的推广,基于算子d使得d^3=0,但d^2 \not =0。一阶和二阶微分生成一个结合代数,我们假定一阶微分之间不存在二元关系,而三元积满足循环关系,基于循环群Z_3的单位立方根表示。我们将等级1归因于一阶微分,等级2归因于二阶微分;在结合乘法律下,等级相加模3。我们展示了如何协变导子的概念可以推广与1-形式A,我们给出的曲率3-形式的局部坐标的表达。最后,引入Z_3-分次外形式的标积和积分的概念,定义了变分原理,导出了曲率3-形式所满足的微分方程。这样得到的拉格朗日量包含了普通规范场张量F_{ik}及其协变导数D_i F_{km}的不变量。

英文摘要:

We present a possible generalization of the exterior differential calculus, based on the operator d such that d^3=0, but d^2\not=0. The first and second order differentials generate an associative algebra; we shall suppose that there are no binary relations between first order differentials, while the ternary products will satisfy the cyclic relations based on the representation of cyclic group Z_3 by cubic roots of unity. We shall attribute grade 1 to the first order differentials and grade 2 to the second order differentials; under the associative multiplication law the grades add up modulo 3. We show how the notion of covariant derivation can be generalized with a 1-form A, and we give the expression in local coordinates of the curvature 3-form. Finally, the introduction of notions of a scalar product and integration of the Z_3-graded exterior forms enables us to define variational principle and to derive the differential equations satisfied by the curvature 3-form. The Lagrangian obtained in this way contains the invariants of the ordinary gauge field tensor F_{ik} and its covariant derivatives D_i F_{km}.

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