Born in Los Angeles with dual French and American citizenship, she swam before she walked.
In 2010, he reported that the mice who practiced on the dual maze actually got smarter on tests of general cognitive abilities.
The only other formal suspect in the case, British-Portuguese dual national Robert Murat, was also cleared at the same time.
Twin-personality roles aside, Portman has dual Israeli-American citizenship.
Understanding the dual use of technologies and that many of the implications transcend national borders is urgently required.
Unquestionably—with unfavorable developments, dual personality complications—I wrote you.
Sometimes a “free for all” is substituted for the dual contest.
None of them have a dual and only Mordvinian an objective conjugation.
Here you have one half of our dual truth; let us now glance at the other half.
If ever a woman lived a dual life, that woman was Mrs. Chattaway.
c.1600, from Latin dualis, from duo "two" (see two). Related: Dually.
mathematics
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)