We obtain a Cartesian form of Putnam's inequality for doubly commuting hyponormal n-tuples, and we establish new relations between the Taylor and Xia spectra of such n-tuples.
THE title of Mr. Smith's book conveys an adequate idea of its scope. The author indicates the lines of his treatment thus:—“In Descartes' system, as we have tried to show, there are three fundamental ...
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