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dual    音标拼音: [d'uəl] [d'ul]
a. 双重的,双的
n. 双数

双重的,双的双数

dual
逻辑被动自动对偶 LPSD


dual
自对偶

dual
双

dual
adj 1: consisting of or involving two parts or components
usually in pairs; "an egg with a double yolk"; "a double
(binary) star"; "double doors"; "dual controls for pilot
and copilot"; "duple (or double) time consists of two (or
a multiple of two) beats to a measure" [synonym: {double},
{dual}, {duple}]
2: having more than one decidedly dissimilar aspects or
qualities; "a double (or dual) role for an actor"; "the
office of a clergyman is twofold; public preaching and
private influence"- R.W.Emerson; "every episode has its
double and treble meaning"-Frederick Harrison [synonym: {double},
{dual}, {twofold}, {two-fold}, {treble}, {threefold}, {three-
fold}]
3: a grammatical number category referring to two items or units
as opposed to one item (singular) or more than two items
(plural); "ancient Greek had the dual form but it has merged
with the plural form in modern Greek"

Dual \Du"al\, a. [L. dualis, fr. duo two. See {Two}.]
Expressing, or consisting of, the number two; belonging to
two; as, the dual number of nouns, etc., in Greek.
[1913 Webster]

Here you have one half of our dual truth. --Tyndall.
[1913 Webster]

43 Moby Thesaurus words for "dual":
Janus-like, ambidextrous, bifacial, bifold, biform, bifurcated,
bilateral, binary, binate, biparous, bipartisan, bipartite,
bivalent, conduplicate, dichotomous, disomatous, double,
double-barreled, double-faced, duadic, dualistic, duple, duplex,
duplicate, duplicated, dyadic, geminate, geminated, identical,
matched, paired, second, secondary, twain, twin, twinned, two,
two-faced, two-level, two-ply, two-sided, two-story, twofold

Every field of mathematics has a different
meaning of dual. Loosely, where there is some binary symmetry
of a theory, the image of what you look at normally under this
symmetry is referred to as the dual of your normal things.

In linear algebra for example, for any {vector space} V, over
a {field}, F, the vector space of {linear maps} from V to F is
known as the dual of V. It can be shown that if V is
finite-dimensional, V and its dual are {isomorphic} (though no
isomorphism between them is any more natural than any other).

There is a natural {embedding} of any vector space in the dual
of its dual:

V -> V'': v -> (V': w -> wv : F)

(x' is normally written as x with a horizontal bar above it).
I.e. v'' is the linear map, from V' to F, which maps any w to
the scalar obtained by applying w to v. In short, this
double-dual mapping simply exchanges the roles of function and
argument.

It is conventional, when talking about vectors in V, to refer
to the members of V' as covectors.

(1997-03-16)


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  • DUAL Australia
    DUAL offers a complete range of specialty products, which can be individually tailored to suit the unique and individual risks
  • Dual (2022 film) - Wikipedia
    Dual is a 2022 American satirical science fiction thriller film written, directed, and produced by Riley Stearns It stars Karen Gillan, Beulah Koale, Theo James, and Aaron Paul
  • DUAL Definition Meaning - Merriam-Webster
    Examples of dual in a Sentence Adjective the dual purpose of the study She pursued dual careers in music and acting
  • Dual (2022) - IMDb
    Dual: Directed by Riley Stearns With Karen Gillan, Aaron Paul, Beulah Koale, Theo James A woman opts for a cloning procedure after she receives a terminal diagnosis but when she recovers her attempts to have her clone decommissioned fail, leading to a court-mandated duel to the death
  • Dual Eligibility for Medicare and Medicaid: How It Works
    Learn the benefits, including long-term care, of being a “dual eligible” or Medicare-Medicaid enrollee, the eligibility criteria for Medicare and Medicaid enrollment, and how to apply
  • Dual streaming: where to watch movie online? - JustWatch
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  • Dual (2022) | Rotten Tomatoes
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  • Dual Eligible Special Needs Plans - UnitedHealthcare
    A Dual Special Needs plan (D-SNP) is a type of health insurance plan It’s for people who have both Medicare and Medicaid These plans are designed for people who may need more help because of disabilities, age or health conditions
  • DUAL | English meaning - Cambridge Dictionary
    DUAL definition: 1 with two parts, or combining two things: 2 two sets of controls in a vehicle, one for the… Learn more
  • DUAL Definition Meaning | Dictionary. com
    DUAL definition: of, relating to, or noting two See examples of dual used in a sentence





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