In mathematics, the Stiefel manifold V k ( R n ) {\displaystyle V_{k}(\mathbb {R} ^{n})} is the set of all orthonormal k-frames in R n . {\displaystyle \mathbb {R} ^{n}.} That is, it is the set of ordered orthonormal k-tuples of vectors in R n .
In mathematics, the Stiefel manifold V k ( R n ) {\displaystyle V_{k}(\mathbb {R} ^{n})} is the set of all orthonormal k-frames in R n . {\displaystyle \mathbb {R} ^{n}.} That is, it is the set of ordered orthonormal k-tuples of vectors in R n .
Source: Wikipedia "Stiefel manifold" · CC BY-SA 4.0
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