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Quadruples of orthoprojectors connected by a linear relationship

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Ukrainian Mathematical Journal Aims and scope

In the explicit form, we deduce formulas for all quadruples of orthoprojectors P 1 , P 2 , P 3 , and P 4 irreducible to within unitary equivalence and connected by the linear relationship α1 P 1 + α2 P 2 + α3 P 3 + α4 P 4 = λI, where (α1, α2, α3, α4) ∈ ℝ+.

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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 62, No. 2, pp. 255–264, February, 2010.

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Yusenko, A.A. Quadruples of orthoprojectors connected by a linear relationship. Ukr Math J 62, 289–301 (2010). https://doi.org/10.1007/s11253-010-0351-5

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  • DOI: https://doi.org/10.1007/s11253-010-0351-5

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