subproper

subproper

English

Etymology

Etymology tree
Proto-Indo-European *upó
Proto-Italic *supo
Latin sub
Latin sub-der.
English sub-
Latin propriusbor.
Anglo-Norman proprebor.
Middle English propre
English proper
English subproper

    From sub- + proper.

    Adjective

    subproper (not comparable)

    1. (mathematics) Having some of the key characteristics of the proper property (which ones depend on the type of proper property).
      • 1987, Journal of the Optical Society of America, page 1795:
        An object can have several subproper centers or none at all. Figure 2 shows the proper center and some subproper centers for the letter E.
      • 1988, Reviews in Global Analysis, 1980-86, page 344:
        The author establishes some basic properties and two surjectivity theorems for subproper operators.
      • 2016, Shou Lin, Ziqiu Yun, Generalized Metric Spaces and Mappings, page 101:
        Obviously, each perfect mapping is a proper mapping, each proper mapping is a subproper mapping and each subproper mapping is a compact-covering mapping.
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