计算机应用 基于网络的信息服务 释文 semantic retrieval 语义检索
- nullity of a linear transformation
- nullity of a link
- nullity of a manifold
- nullity of a matrix
- nullity of an operator
- nullity of a space
- nullity of a transformation
- null line
- null matrix
- null method
- null model
- null morphism
- null mutation
- null object
- null object of a category
- null-pair
- null path
- null plane
- null point
- null polarity
- null polynomial
- null-property
- null ray
- null-recurrent
- null-recurrent point