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  2. Cantor's isomorphism theorem - Wikipedia

    en.wikipedia.org/wiki/Cantor's_isomorphism_theorem

    In order theory and model theory, branches of mathematics, Cantor's isomorphism theorem states that every two countable dense unbounded linear orders are order-isomorphic.For instance, Minkowski's question-mark function produces an isomorphism (a one-to-one order-preserving correspondence) between the numerical ordering of the rational numbers and the numerical ordering of the dyadic rationals.

  3. Order type - Wikipedia

    en.wikipedia.org/wiki/Order_type

    Every well-ordered set is order-equivalent to exactly one ordinal number, by definition. The ordinal numbers are taken to be the canonical representatives of their classes, and so the order type of a well-ordered set is usually identified with the corresponding ordinal. Order types thus often take the form of arithmetic expressions of ordinals.

  4. Total order - Wikipedia

    en.wikipedia.org/wiki/Total_order

    The rational numbers form an initial totally ordered set which is dense in the real numbers. Moreover, the reflexive reduction < is a dense order on the rational numbers. The real numbers form an initial unbounded totally ordered set that is connected in the order topology (defined below). Ordered fields are totally ordered by definition. They ...

  5. Ordered field - Wikipedia

    en.wikipedia.org/wiki/Ordered_field

    The smallest subfield is isomorphic to the rationals (as for any other field of characteristic 0), and the order on this rational subfield is the same as the order of the rationals themselves. If every element of an ordered field lies between two elements of its rational subfield, then the field is said to be Archimedean.

  6. Integer sorting - Wikipedia

    en.wikipedia.org/wiki/Integer_sorting

    In computer science, integer sorting is the algorithmic problem of sorting a collection of data values by integer keys. Algorithms designed for integer sorting may also often be applied to sorting problems in which the keys are floating point numbers, rational numbers, or text strings. [1]

  7. When are College Football Playoff rankings released? What to know

    www.aol.com/college-football-playoff-rankings...

    Week 14 of college football action is underway, and the outcomes of Saturday's games are set to significantly impact the College Football Playoff, with 20 of the top 25 teams in action.This ...

  8. AOL Mail - AOL Help

    help.aol.com/products/aol-webmail

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  9. 4 Signs Your Almond Milk Has Definitely Gone Bad - AOL

    www.aol.com/4-signs-almond-milk-definitely...

    Almond milk can come in many different forms that can affect the taste, consistency, and shelf life. Homemade almond milk expires the fastest, thanks to the lack of additives, pasteurization, and ...