例句與造句

1. In the set of all finite crystallographic hyperplane arrangements ( and hence finite Weyl groupoids or finite generalized root systems ) have been classified.
2. The smallest crystallographic hyperplane arrangement, Weyl groupoid, generalized root system, which is not of ordinary Lie type, is as follows.
3. Nichols algebra ( under sufficient finiteness conditions ) there exists a generalized root system with a set of roots \ Phi, which controls the Nichols algebra.
4. In contrast to ordinary crystallographic root systems known from Lie algebras, the same generalized root system \ Phi may possess several be "'different Weyl chambers "', corresponding to non-equivalent choices of sets of positive roots \ Phi = \ Phi ^ + \ cup-\ Phi ^ + and simple positive roots \ alpha _ 1, \ ldots \ alpha _ n, having different Cartan matrices and different Dynkin diagrams.
5. It's difficult to find generalized root system in a sentence. 用generalized root system造句挺難的