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 Quasisimilarity and injective $p$-quasihyponormal operators Bull. Korean Math. Soc. 2005 Vol. 42, No. 3, 653-659 Printed September 1, 2005 Young Jin Woo Seoil College Abstract : In this paper it is proved that quasisimilar $n$-tuples of tensor products of injective $p$-quasihyponormal operators have the same spectra, essential spectra and indices, respectively. And it is also proved that a Weyl $n$-tuple of tensor products of injective $p$-quasihyponormal operators can be perturbed by an $n$-tuple of compact operators to an invertible $n$-tuple. Keywords : quasisimilarity, $p$-quasihyponormal operator MSC numbers : 47B20 Downloads: Full-text PDF