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  2. Aleph number - Wikipedia

    en.wikipedia.org/wiki/Aleph_number

    aleph-nought, aleph-zero, or aleph-null) is the cardinality of the set of all natural numbers, and is an infinite cardinal.The set of all finite ordinals, called or (where is the lowercase Greek letter omega), also has cardinality .

  3. Absolute infinite - Wikipedia

    en.wikipedia.org/wiki/Absolute_Infinite

    The absolute infinite (symbol: Ω), in context often called "absolute", is an extension of the idea of infinity proposed by mathematician Georg Cantor. It can be thought of as a number that is bigger than any other conceivable or inconceivable quantity, either finite or transfinite .

  4. Zeros and poles - Wikipedia

    en.wikipedia.org/wiki/Zeros_and_poles

    Because of the order of zeros and poles being defined as a non-negative number n and the symmetry between them, it is often useful to consider a pole of order n as a zero of order –n and a zero of order n as a pole of order –n. In this case a point that is neither a pole nor a zero is viewed as a pole (or zero) of order 0.

  5. Infinity - Wikipedia

    en.wikipedia.org/wiki/Infinity

    In 1655, John Wallis first used the notation for such a number in his De sectionibus conicis, [19] and exploited it in area calculations by dividing the region into infinitesimal strips of width on the order of . [20] But in Arithmetica infinitorum (1656), [21] he indicates infinite series, infinite products and infinite continued fractions by ...

  6. Infinitesimal - Wikipedia

    en.wikipedia.org/wiki/Infinitesimal

    The system could have all the first-order properties of the real number system for statements involving any relations (regardless of whether those relations can be expressed using +, ×, and ≤). For example, there would have to be a sine function that is well defined for infinite inputs; the same is true for every real function.

  7. Actual infinity - Wikipedia

    en.wikipedia.org/wiki/Actual_infinity

    Cantor distinguished two types of actual infinity, the transfinite and the absolute, about which he affirmed: These concepts are to be strictly differentiated, insofar the former is, to be sure, infinite, yet capable of increase, whereas the latter is incapable of increase and is therefore indeterminable as a mathematical

  8. Glossary of set theory - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_set_theory

    5. Cantor's absolute infinite Ω is something to do with the class of all ordinals 6. Cantor's absolute is a somewhat unclear concept sometimes used to mean the class of all sets 7. Cantor's theorem states that the powerset operation increases cardinalities Card The cardinality of a set Cartesian product

  9. 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").