"A block reflector is an orthogonal, symmetric matrix that reverses a subspace whose dimension may be greater than one." It is built out of many elementary reflectors. It is also referred to as a triangular factor, and is a triangular matrix and they are used in the Householder transformation.
"A block reflector is an orthogonal, symmetric matrix that reverses a subspace whose dimension may be greater than one." It is built out of many elementary reflectors. It is also referred to as a triangular factor, and is a triangular matrix and they are used in the Householder transformation.
Source: Wikipedia "Block reflector" · CC BY-SA 4.0
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