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中国独裁统治 China Dictatorship 新疆改造中心、六四事件、法轮功、郝海东、709大抓捕、2015巴拿马文件 邓家贵、低端人口、西藏骚乱
When viewed as matrices, it is the group of all matrices that preserve the dot product, i.e.:
This implies that it also preserves important geometric notions such as norm (intuitively: distance between two points) and angles.
This is perhaps the best "default definition".
- All indefinite orthogonal groups of matrices of equal metric signature are isomorphic
- Definition of the indefinite orthogonal group
- Definition of the orthogonal group
- The orthogonal group is the group of all invertible matrices where the inverse is equal to the transpose
- The orthogonal group is the group of all matrices with orthonormal rows and orthonormal columns
- What happens to the definition of the orthogonal group if we choose other types of symmetric bilinear forms