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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 Definition Meaning - Merriam-Webster
    The agreement also eliminates export restrictions and import duties on raw materials, while prohibiting export monopolies and banning dual pricing on these inputs, to help secure the bloc’s access to critical minerals
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    Dual Electronics products for Car, Marine, and Home offer entertainment, connectivity, and safety both at home and on the go Sound Travels
  • 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
  • NALICO, now DUAL North America
    DUAL is a global underwriting business operating from 21 countries, offering 70+ products and services and partnering with over 11,000 brokers and agents worldwide Visit our Group site for more information
  • 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 Definition Meaning | Dictionary. com
    DUAL definition: of, relating to, or noting two See examples of dual used in a sentence
  • 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 (2022) | Rotten Tomatoes
    Discover reviews, ratings, and trailers for Dual (2022) on Rotten Tomatoes Stay updated with critic and audience scores today!
  • Dual – High-Quality Turntables | Official Website
    Discover tradition, precision, and quality with Dual Our automatic and manual turntables, belt and direct-drives set industry standards





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