Hilbert's theorem 90 in matrix rings†
- 1 January 1973
- journal article
- research article
- Published by Taylor & Francis in Linear and Multilinear Algebra
- Vol. 1 (1) , 5-8
- https://doi.org/10.1080/03081087308817002
Abstract
The fact that every unitary matrix can be expressed in the form A-1A∗ (observed by C. R. Johnson) is interpreted as a "Hilbert Theorem 90" in rings with an involution. Several observations connected with this are included.Keywords
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