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  2. Closed captioning - Wikipedia

    en.wikipedia.org/wiki/Closed_captioning

    Closed captioning (CC) is a form of subtitling, ... Improvements in speech recognition technology mean that live captioning may be fully or partially automated.

  3. Closure (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Closure_(mathematics)

    Conversely, if closed sets are given and every intersection of closed sets is closed, then one can define a closure operator C such that () is the intersection of the closed sets containing X. This equivalence remains true for partially ordered sets with the greatest-lower-bound property , if one replace "closed sets" by "closed elements" and ...

  4. Closed-form expression - Wikipedia

    en.wikipedia.org/wiki/Closed-form_expression

    The quadratic formula =. is a closed form of the solutions to the general quadratic equation + + =. More generally, in the context of polynomial equations, a closed form of a solution is a solution in radicals; that is, a closed-form expression for which the allowed functions are only n th-roots and field operations (+,,, /).

  5. Closed set - Wikipedia

    en.wikipedia.org/wiki/Closed_set

    The notion of closed set is defined above in terms of open sets, a concept that makes sense for topological spaces, as well as for other spaces that carry topological structures, such as metric spaces, differentiable manifolds, uniform spaces, and gauge spaces. Whether a set is closed depends on the space in which it is embedded.

  6. Algebraically closed field - Wikipedia

    en.wikipedia.org/wiki/Algebraically_closed_field

    The assertion "the polynomials of degree one are irreducible" is trivially true for any field. If F is algebraically closed and p(x) is an irreducible polynomial of F[x], then it has some root a and therefore p(x) is a multiple of x − a. Since p(x) is irreducible, this means that p(x) = k(x − a), for some k ∈ F \ {0} .

  7. Sell To Open vs. Sell To Close: Understand The Difference - AOL

    www.aol.com/finance/sell-open-vs-sell-close...

    Sell to close means selling an option previously bought to open the transaction. This closes the position. Sell to close can result in a profit, ...

  8. Interval (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Interval_(mathematics)

    A closed interval is an interval that includes all its endpoints and is denoted with square brackets. [2] For example, [0, 1] means greater than or equal to 0 and less than or equal to 1. Closed intervals have one of the following forms in which a and b are real numbers such that :

  9. Can closed accounts be removed from your credit report? - AOL

    www.aol.com/finance/closed-accounts-removed...

    Closed accounts on your report will eventually disappear on their own. Generally, negative information on your reports is removed after seven years, while accounts closed in good standing will ...