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  2. Narcissistic number - Wikipedia

    en.wikipedia.org/wiki/Narcissistic_number

    In number theory, a narcissistic number [1] [2] (also known as a pluperfect digital invariant (PPDI), [3] an Armstrong number [4] (after Michael F. Armstrong) [5] or a plus perfect number) [6] in a given number base is a number that is the sum of its own digits each raised to the power of the number of digits.

  3. Automorphic number - Wikipedia

    en.wikipedia.org/wiki/Automorphic_number

    Given a number base , a natural number with digits is an automorphic number if is a fixed point of the polynomial function = over /, the ring of integers modulo.As the inverse limit of / is , the ring of -adic integers, automorphic numbers are used to find the numerical representations of the fixed points of () = over .

  4. Interval arithmetic - Wikipedia

    en.wikipedia.org/wiki/Interval_arithmetic

    The main objective of interval arithmetic is to provide a simple way of calculating upper and lower bounds of a function's range in one or more variables. These endpoints are not necessarily the true supremum or infimum of a range since the precise calculation of those values can be difficult or impossible; the bounds only need to contain the function's range as a subset.

  5. Armstrong number - Wikipedia

    en.wikipedia.org/?title=Armstrong_number&redirect=no

    From a synonym: This is a redirect from a semantic synonym of the target page title.. For example: automobile car This template should not be used to tag redirects that are taxonomic synonyms.

  6. Interval (mathematics) - Wikipedia

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

    In summary, a set of the real numbers is an interval, if and only if it is an open interval, a closed interval, or a half-open interval. [4] [5] A degenerate interval is any set consisting of a single real number (i.e., an interval of the form [a, a]). [6] Some authors include the empty set in this definition.

  7. Trump Organization plans a Trump Tower in Saudi Arabia, Eric ...

    www.aol.com/news/trump-organization-plans-trump...

    Dar Global, the international arm of Saudi Arabia's Dar Al Arkan Real Estate Development Company 4300.SE, has agreed a number of deals with The Trump Organization, including plans for Trump towers ...

  8. Many student loan borrowers are in for a big, bad surprise in ...

    www.aol.com/finance/many-student-loan-borrowers...

    There are approximately 5.6 million former students currently in default, meaning their loans are at least 270 days behind on payment, who could be immediately affected when collections crank back ...

  9. Interval scheduling - Wikipedia

    en.wikipedia.org/wiki/Interval_scheduling

    The following greedy algorithm finds a solution that contains at least 1/2 of the optimal number of intervals: [8] Select the interval, x, with the earliest finishing time. Remove x, and all intervals intersecting x, and all intervals in the same group of x, from the set of candidate intervals. Continue until the set of candidate intervals is ...