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A Note on Non-Negative Matrices

Published online by Cambridge University Press:  20 November 2018

C. R. Putnam*
Affiliation:
Purdue University
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This note can be regarded as an addendum to the paper (4). On the complex Hilbert space of vectors x = (x1, x2, … ,) a matrix A is said to be bounded if there exists a constant M such that ||Ax|| ≦ M||x|| whenever ||x||2 = Σ|xk|2 < ∞ ; the least such M is denoted by ||A||. Only bounded matrices A and vectors x satisfying ||x|| < ∞ will be considered in the sequel. The spectrum of A, denoted by sp(A), is the set of values for which the resolvent R(λ) = (A — λI)-1 fails to be bounded. The notation A ≥ 0 or A > 0, where A = (aij), means that, for all i and j , aij ≥ 0 or aij 0 respectively.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1961

References

1. Birkhoff, G. and Varga, R. S., Reactor criticality and nonnegative matrices, J. Soc. Indust. Appl. Math., 6 (1958), 354377.Google Scholar
2. Herstein, I. N., A note on primitive matrices, Amer. Math. Monthly, 61 (1954), 1820.Google Scholar
3. Krein, M. G. and Rutman, M. A., Linear operators leaving invariant a cone in a Banach space, Uspehi Matem., Nauk (N.S.), 3 (23) 1948), 395; Amer. Math. Soc. Translation No. 26 (page reference in paper refers to this translation).Google Scholar
4. Putnam, C. R., On bounded matrices with non-negative elements, Can. J. Math., 10 (1958), 587591.Google Scholar
5. Riesz, F. and Sz-Nagy, B., Leçons d'analyse fonctionnelle (Budapest, 1953).Google Scholar
6. Winter, A., Spektraltheorie der unendlichen Matrizen (Leipzig, 1929).Google Scholar