Projective

adj, noun

Definitions

Adjective
  1. 1
    projecting outward
  2. 2
    of, relating to, or caused by a projection
  3. 3
    Of or related to projective geometry:; Invariant under projective transformations. usually

    "Hence the non-Euclidean angle is measured by one-half the logarithm of the cross-ratio of four rays. Although the Euclidean point of view has been adopted for simplicity, the final result, depending as it does only on the cross-ratio, is projective; it is therefore independent of the particular assumptions that the rays α and β are perpendicular and that the initial line bisects the angle between them."

  4. 4
    Of or related to projective geometry:; Defined in or inhabiting a projective space. usually
  5. 5
    In a technical sense, general (but not necessarily so general as to be free); involving such objects:; Such that there is another (left) R-module N with M⊕N a free R-module. Equivalently, projective in the category of modules (see below).
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  1. 6
    In a technical sense, general (but not necessarily so general as to be free); involving such objects:; Such that, given an epimorphism e:E→X and morphism f:P→X, f factors through e; that is, there exists a morphism ̃f:P→E with e∘̃f=f.
  2. 7
    In a technical sense, general (but not necessarily so general as to be free); involving such objects:; Such that every epimorphism from a profinite group onto G has a right inverse which is a homomorphism.
  3. 8
    In a technical sense, general (but not necessarily so general as to be free); involving such objects:; Such that every object in the resolution is projective.
Noun
  1. 1
    An assessment test that presents subjects with some sort of stimulus to which they react by projecting or imagining details.

    "The projectives suggested considerable difficulty with women and a conflict between sexual preoccupation and hostility."

  2. 2
    A projective member of a category.

    "By 2.2 we see that this is a full, contravariant imbedding, and by 2.3 the image of A in (A, G) is a generating set of small projectives."

  3. 3
    A statement about a conditional or potential state of affairs, as opposed to one about a situation that actually exists or existed.

    "There was no basis for expecting differences in the frequency of projectives or turnabouts as a function of partner."

Etymology

Etymology 1

Formed by the suffixation of prōiect- (the perfect passive participial stem of the Classical Latin prōiciō, whence the English verb project) with the English -ive, forming project + -ive; however, compare the post-Classical Latin prōiectīvus (“relating to purging”).

Etymology 2

Formed by the suffixation of prōiect- (the perfect passive participial stem of the Classical Latin prōiciō, whence the English verb project) with the English -ive, forming project + -ive; however, compare the post-Classical Latin prōiectīvus (“relating to purging”).

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