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Right and Left Orthogonality

Published online by Cambridge University Press:  20 November 2018

Jonathan Wild*
Affiliation:
Collins Bay, Ontario
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Let V be a vector space over an arbitrary field F. In V a bilinear form

is given. If f is symmetric [(x, y) ≡ (y, x)] or skew-symmetric [(x, y) + (y, x) ≡ 0], then

1

Thus right and left orthogonality coincide. It is well known that (1) implies conversely that f is either symmetric or skew-symmetric in V. We wish to give a simple proof of this result.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1961