J. Hilgert, “A Note on Howe’s Oscillator Semigroup,” Ann. Inst. Fourier, vol. 39, pp. 663–688, 1989.
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J. Hilgert, K. H. Hofmann, and J. D. Lawson, Eds., Lie Groups, Convex Cones, and Semigroups. Oxford: Oxford University Press, 1989.
LibreCat: /record/51498

J. Hilgert, “Spectrally Ordered Lie Algebras,” in Group Theoretical Methods in Physics, vol. 313, H. D. Doebner and et al., Eds. New York: Springer, 1988.
LibreCat: /record/51485

J. Hilgert, “Invariant Lorentzian Orders on Simply Connected Lie Groups,” Arkiv för mat., vol. 26, pp. 107–115, 1988.
LibreCat: /record/51449

J. Hilgert and K. H. Hofmann, “Classification of Invariant Cones in Real Lie Algebras,” Bull. AMS, vol. 11, pp. 441–446, 1988.
LibreCat: /record/51450

J. Hilgert and K. H. Hofmann, “Invariant Cones in Lie Algebras,” Semigroup Forum 37l. Semigroup Forum, pp. 241–252, 1988.
LibreCat: /record/51451

J. Hilgert, “Maximal Semigroups and the Support of Gauss-Semigroups,” in Probability and Baysian Statistics, R. Viertl, Ed. New York: Plenum Press, 1987.
LibreCat: /record/51486

J. Hilgert, “Maximal Semigroups and Controllability in Products of Lie Groups,” Archiv Math., vol. 49, pp. 189–195, 1987.
LibreCat: /record/51452

J. Hilgert and K. H. Hofmann, “Invariant Cones in Real Lie Algebras,” in Aspects of Positivity in Functional Analysis, R. Nagel and et al., Eds. North Holland, 1986.
LibreCat: /record/51487

J. Hilgert, “The Mayer-Vietoris and the Puppe Sequence in K-Theory for C*-algebras,” Studia Math., vol. 83, pp. 97–104, 1986.
LibreCat: /record/51454