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  2. This 'absolutely gorgeous' diamond initial necklace is a ...

    www.aol.com/lifestyle/this-absolutely-gorgeous...

    This diamond initial necklace comes in all the letters of the alphabet and is the perfect gift this holiday season.

  3. Eternity ring - Wikipedia

    en.wikipedia.org/wiki/Eternity_ring

    Eternity ring. An eternity ring, also known as an infinity ring, is a woman's ring [1] comprising a band of precious metal (usually gold) set with a continuous line of identically cut gemstones (usually diamonds) [2] to symbolize never-ending love, usually given by a spouse to their wife on the occasion of a significant anniversary, [citation needed] typically after five years of marriage.

  4. Diamond principle - Wikipedia

    en.wikipedia.org/wiki/Diamond_principle

    The diamond principle says that there exists a -sequence, a family of sets A α ⊆ α for α < ω 1 such that for any subset A of ω 1 the set of α with A ∩ α = A α is stationary in ω 1. There are several equivalent forms of the diamond principle.

  5. Countable set - Wikipedia

    en.wikipedia.org/wiki/Countable_set

    In mathematics, a set is countable if either it is finite or it can be made in one to one correspondence with the set of natural numbers. [a] Equivalently, a set is countable if there exists an injective function from it into the natural numbers; this means that each element in the set may be associated to a unique natural number, or that the elements of the set can be counted one at a time ...

  6. Transfinite number - Wikipedia

    en.wikipedia.org/wiki/Transfinite_number

    Any finite natural number can be used in at least two ways: as an ordinal and as a cardinal. Cardinal numbers specify the size of sets (e.g., a bag of five marbles), whereas ordinal numbers specify the order of a member within an ordered set [9] (e.g., "the third man from the left" or "the twenty-seventh day of January").

  7. Diamond League - Wikipedia

    en.wikipedia.org/wiki/Diamond_League

    The full sponsorship name is the Wanda Diamond League, the result of an agreement with Wanda Group that was announced in December 2019. [ 4 ] While the Golden League was formed to increase the profile of the leading European athletics competitions, the Diamond League's aim is to "enhance the worldwide appeal of athletics by going outside Europe ...