例句與造句

1. Other work included that of Felix Klein in computing the invariant rings of finite group actions on \ mathbf { C } ^ 2 ( the binary polyhedral groups, classified by the ADE classification ); these are the coordinate rings of du Val singularities.
2. For example, a central polynomial is an element of the ring F _ n that will map to a central element under an evaluation . ( In fact, it is in the invariant ring k [ ( X _ l ) _ { ij } ] ^ { \ operatorname { GL } _ n ( k ) } since it is central and invariant .)
3. It's difficult to find invariant ring in a sentence. 用invariant ring造句挺難的