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In mathematics, the supernatural numbers, sometimes called generalized natural numbers or Steinitz numbers, are a generalization of the natural numbers. They were used by Ernst Steinitz [1] : 249–251 in 1910 as a part of his work on field theory . A supernatural number is a formal product : where runs over all prime numbers, and each is zero ...
Fixed-line (landline) numbers. Calls within an area code (The area code is a 2 digits number, i.e. 21, 41, 46 0 THE-AREA-CODE xx xx xx. C; Calls from outside Algeria ("yy" is the area code) +213 yy xx xx xx. Mobile numbers. Calls from Algeria ("y" is the operator code, 5 for Ooredoo, 6 for Mobilis, 7 for Djezzy) 0yxx xx xx xx
Super-prime. Super-prime numbers, also known as higher-order primes or prime-indexed primes ( PIPs ), are the subsequence of prime numbers that occupy prime-numbered positions within the sequence of all prime numbers. In other words, if you matched prime numbers with ordinal numbers, starting with prime number 2 matched with ordinal number 1 ...
To call a Zimbabwean number from another country: dial: the international access code (i.e. 00 for most European countries, and 011 from North America), followed by the country code (263), followed by the area code, and then the required subscriber number. [1] Example for calling a subscriber in Harare, Zimbabwe, dail: 00 263 24 2xx xxx (x ...
22 xxxxxx. Landline number in Nicosia called from abroad: +357 22 xxxxxx. Mobile phone number called from within Cyprus: 9x xxxxxx (during that period only 09 code was in use, from CYTA) Mobile phone number called from abroad: +357 9x xxxxxx. As with fixed line numbers, under the new system, these changed to numbers with eight digits, to be ...
Superabundant number. In mathematics, a superabundant number is a certain kind of natural number. A natural number n is called superabundant precisely when, for all m < n : where σ denotes the sum-of-divisors function (i.e., the sum of all positive divisors of n, including n itself). The first few superabundant numbers are 1, 2, 4, 6, 12, 24 ...
The Ghana telephone numbering plan is the system used for assigning telephone numbers in Ghana. It is regulated by the National Communications Authority, which holds responsibility for telecommunications . Since 1 May 2010, all fixed-line numbers and mobile numbers have 9 national (significant) numbers after the '0' trunk code. [1]
Telephone numbers in Portugal. Portugal changed to a closed telephone numbering plan on 31 October 1999; previously, the trunk prefix was '0', but this was dropped. [1] For landline subscribers, the area code, prefixed by the digit '2', was incorporated into the subscriber's number. For mobile subscribers, formerly seven (to call another ...