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Remarks on a Paper by S. Trott
Published online by Cambridge University Press: 20 November 2018
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There are several statements in [3] which require clarification.
Theorem 1 [3, p. 246] states that U3= U2U4 U2-1U4 U2 U4. In fact this is (essentially) the relation O = PUPU-1PU given in [1, p. 91, (7.35)]. To see this we note that 0 = U3, P = U4, U = U4U2U4 (as explained in [1, p. 88]); since U42, = E,
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- Copyright © Canadian Mathematical Society 1964