A inteligibilidade da palavra em igrejas católicas, através de análises de carácter objectivo e subjectivo
Lencastre, Margarida Maria Mendes de Freitas de Queiroz e
1988-01-01
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It is shown that if A and B are n x n complex matrices with A = A* and ||AB - BA||2/(n - 1), then there exist n x n matrices A' and B' with A' = A'* such that A'B' = B'A' and ||A - A'||[les] [epsilon], ||B - B'||[les] [epsilon].
