Definition of "matrix"

upon conception the inward orifice of the matrix exactly closeth, so that it commonly admitteth nothing after […]

1650, Thomas Browne, “Enquiries into Vulgar”, in Pseudodoxia Epidemica: […], 2nd edition, London: […] A[braham] Miller, for Edw[ard] Dod and Nath[aniel] Ekins, […], 3rd book, page 122

In very rare cases, when the matrix just goes on pegging away automatically, the doctor can take advantage of that and ease out the second brat who then can be considered to be, say, three minutes younger […]

1969, Vladimir Nabokov, “(please specify the chapter number)”, in Ada, or, Ardor: A Family Chronicle, Harmondsworth, London: Penguin Books, published 1970, part 2, page 269

When it is remembered that ritual dancing was the matrix out of which the Drama sprang, and further that the drama in its inception (as still to-day in India) was an affair of religion and was acted in, or in connection with, the Temples, it becomes easier to understand how all this mass of ceremonial sacrifices, expiations, initiations, Sun and Nature festivals, eucharistic and orgiastic communions and celebrations, mystery-plays, dramatic representations, myths and legends, etc. [...] have practically sprung from the same root: a root deep and necessary in the psychology of Man.

1920, Edward Carpenter, Pagan and Christian Creeds, New York: Harcourt, Brace and Co., published 1921, page 172

Theorem (7.5.2) then says that every positive semidefinite matrix is a convex combination of matrices that lie on extreme rays.

1987, Roger A. Horn, Charles R. Johnson, Matrix Analysis, Paperback edition, Cambridge University Press, published 1990, page 464

Check that the A ( D ) 2 {\displaystyle {\mathcal {A}}({\mathcal {D}})^{2}} in the example is itself the adjacency matrix of the indicated digraph:

2003, Robert A. Liebler, Basic Matrix Algebra with Algorithms and Applications‎, CRC Press (Chapman & Hall/CRC), page 64

The matrix describing the reflection at a plane mirror can be obtained by taking the matrix for reflection at a spherical reflector and letting the radius of the spherical mirror tend to infinity.

2007, Gerhard Kloos, Matrix Methods for Optical Layout, SPIE Press, page 25

He'd operated on an almost permanent adrenaline high, a byproduct of youth and proficiency, jacked into a custom cyberspace deck that projected his disembodied consciousness into the consensual hallucination that was the matrix.

1984, William Gibson, Neuromancer (Sprawl; book 1), New York, N.Y.: Ace Books, page 5

Mari Otsu, a 25-year-old Japanese-Hawaiian artist, tells me she was “desperately lonely” while she was studying at New York University, when she “realised that [she][sic] was in the matrix”. I ask her what she means.

2023 October 28, Jemima Kelly, “Back to school”, in FT Weekend, Life & Arts, page 20

Any type of core or diode matrix used to derive the decoding of these codes would amount to a rather large volume of terminals for just the 17,500 terminals alone.

1949, Proceedings of the Association of American Railroads

The transistor matrix in the encoder supplies the sequential gates.

1959, John Millar Carroll, Modern Transistor Circuits

A transistor-diode matrix is composed of vertical and horizontal wires with a transistor at each intersection.

1962, Burroughs Corporation, Digital Computer Principles

Robot controllers range in complexity from simple stepping switches through pneumatic logic sequencers, diode matrix boards, electronic sequencers, and microprocessors to minicomputers.

1987, David Ardayfio, Fundamentals of Robotics

Diode matrix is the most fundamental of all ROM structure.

2002, B. Somantathan Nair, Digital Electronics and Logic Design