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Some inequalities concerning immanants

Published online by Cambridge University Press:  24 October 2008

Peter Heyfron
Affiliation:
Department of Mathematics, Imperial College, 180 Queen's Gate, London SW7 2BZ

Extract

In [13] T. H. Pate has recently proved an important inequality between immanants of Hermitian positive semi-definite matrices. In this paper we introduce some more inequalities with the eventual aim of better understanding the permanental dominance conjecture. Indeed the results in this paper together with known results show that the permanental dominance conjecture for immanants is true for all n × n Hermitian positive semi-definite matrices with n ≤ 8, except perhaps for the case of the partition (24) of 8.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1991

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References

REFERENCES

[1]Grone, R. and Merris, R.. A Fischer inequality for the second immanant. Linear Algebra Appl. 87 (1987), 7783.CrossRefGoogle Scholar
[2]Grone, R. and Merris, R.. A Hadamard inequality for the third and fourth immanants. Linear and Multilinear Algebra 21 (1987), 201209.Google Scholar
[3]Grone, R., Merris, R. and Watkins, W.. A Hadamard dominance theorem for a class of immanants. Linear and Multilinear Algebra 19 (1986), 167171.CrossRefGoogle Scholar
[4]Hadamard, J.. Résolution d'une question relative aux déterminants. Bull. Sci. Math. 2 (1893), 240248.Google Scholar
[5]Heyfron, P.. Immanant dominance orderings for hook partitions. Linear and Multilinear Algebra 24 (1988), 6578.CrossRefGoogle Scholar
[6]Heyfron, P.. A generalization of Hadamard's inequality. (Preprint.)Google Scholar
[7]Heyfron, P.. Positive functions defined on Hermitian positive semi-definite matrices. Ph.D. thesis, University of London (1989).Google Scholar
[8]James, G. D.. The Representation Theory of the Symmetric Groups. Lecture Notes in Math. vol. 682 (Springer-Verlag, 1978).Google Scholar
[9]James, G. D.. Permanents, immanants and determinants. In Proc. Sympos. Pure Math. 47 (1987), 431436 (American Mathematical Society).Google Scholar
[10]James, G. D. and Liebeck, M. W.. Permanents and immanants of Hermitian matrices. Proc. London Math. Soc. (3), 55 (1987), 243265.CrossRefGoogle Scholar
[11]Johnson, C. R.. The permanent-on-top conjecture: a status report. In Current Trends in Matrix Theory (editors Uhlig, F. and Grone, R.) (North-Holland, 1986). pp. 167174.Google Scholar
[12]Merris, R.. The permanental dominance conjecture. In Current Trends in Matrix Theory (editors Uhlig, F. and Grone, R.) (North-Holland, 1986). pp. 213223.Google Scholar
[13]Pate, T. H.. Partitions, irreducible characters, and inequalities for generalized matrix functions. Trans. Amer. Math. Soc. (In the Press.)Google Scholar
[14]Schur, I.. Über endliche Gruppen und hermitesche Formen. Math. Z. 1 (1918), 184207.Google Scholar