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Ordinal number – Generalization of "n-th" to infinite cases (the related, but more formal and abstract, usage in mathematics) Ordinal data, in statistics; Ordinal date – Date written as number of days since first day of year; Regnal ordinal – Ordinal numbers used to distinguish among persons with the same name who held the same office
In set theory, an ordinal number, or ordinal, is a generalization of ordinal numerals (first, second, n th, etc.) aimed to extend enumeration to infinite sets. [1] A finite set can be enumerated by successively labeling each element with the least natural number that has not been previously used.
Even and odd numbers: An integer is even if it is a multiple of 2, and is odd otherwise. Prime number: A positive integer with exactly two positive divisors: itself and 1. The primes form an infinite sequence 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, ...
In Latin and Greek, the ordinal forms are also used for fractions for amounts higher than 2; only the fraction 1 / 2 has special forms. The same suffix may be used with more than one category of number, as for example the orginary numbers second ary and terti ary and the distributive numbers bi nary and ter nary .
Exception to this rule are the ordinal numerals first, second and third. If the basic word ends on the letter t and we add the suffixes for ordinal numerals, then a double t is generally produced. For the ordinal numerals seventh and eighth, we reduce some of the letters of the basic number, for example: osum > osmi (eighth), sedum > sedmi ...
The successor of an even ordinal is odd, and vice versa. [1] [2] Let α = λ + n, where λ is a limit ordinal and n is a natural number. The parity of α is the parity of n. [3] Let n be the finite term of the Cantor normal form of α. The parity of α is the parity of n. [4] Let α = ωβ + n, where n is a natural number. The parity of α is ...
Numeration or numeral systems are about the names and naming systems that are used in the spoken/written language for numbers, and the digit symbols and notational system used to write numbers with digits.
To form the ordinal number (second, third, etc.), except for first, maika-is prefixed to the cardinal form. Note the exceptional forms for third, fourth and sixth. In some cases, Ilocano speakers tend to use Spanish ordinal numbers, especial in first, second, and third (primero/a, segundo/a, tersero/a).