proper value

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English

Noun

proper value (plural proper values)

  1. (dated, linear algebra) An eigenvalue.
    • 1961 , Sterling K. Berberian, Introduction to Hilbert Space, American Mathematical Society (AMS Chelsea), 1999, Reprint, page 178,
      In this terminology, Theorem 1 asserts that every non-zero proper value of a CC-operator has finite multiplicity. This result is not always helpful, for there exist CC-operators having no proper values at all:
    • 1962, A. R. Amir-Moéz, A. L. Fass, Elements of Linear Space, Pergamon Press, page 134:
      Thus any proper value of AA* is a proper value of A*A.
    • 2010, F. Takens, A Vanderbauwhede, Local invariant manifolds and normal forms, H. Broer, F. Takens, B. Hasselblatt (editors), Handbook of Dynamical Systems, Volume 3, Elsevier (North-Holland), page 106,
      The proper values of this linear mapping are:
      – the proper values of L;
      – for each proper value α of L|Ec and proper value β of L|Eu, the proper value α/β — from the assumptions it follows that this latter collection of proper values consists of contracting proper values only.

Usage notes

  • Formerly the standard term in English; replaced by eigenvalue during the course of the 20th century.
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