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  2. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    The first position represents 10 0 (1), the second position 10 1 (10), the third position 10 2 (10 × 10 or 100), the fourth position 10 3 (10 × 10 × 10 or 1000), and so on. Fractional values are indicated by a separator, which can vary in different locations. Usually this separator is a period or full stop, or a comma. Digits to the right of ...

  3. Permutation pattern - Wikipedia

    en.wikipedia.org/wiki/Permutation_pattern

    In combinatorial mathematics and theoretical computer science, a (classical) permutation pattern is a sub-permutation of a longer permutation.Any permutation may be written in one-line notation as a sequence of entries representing the result of applying the permutation to the sequence 123...; for instance the sequence 213 represents the permutation on three elements that swaps elements 1 and 2.

  4. Permutation - Wikipedia

    en.wikipedia.org/wiki/Permutation

    In the Lehmer code for a permutation σ, the number d n represents the choice made for the first term σ 1, the number d n−1 represents the choice made for the second term σ 2 among the remaining n − 1 elements of the set, and so forth. More precisely, each d n+1−i gives the number of remaining elements strictly less than the term σ i.

  5. Unary numeral system - Wikipedia

    en.wikipedia.org/wiki/Unary_numeral_system

    The unary numeral system is the simplest numeral system to represent natural numbers: [1] to represent a number N, a symbol representing 1 is repeated N times. [2]In the unary system, the number 0 (zero) is represented by the empty string, that is, the absence of a symbol.

  6. Semaphore (programming) - Wikipedia

    en.wikipedia.org/wiki/Semaphore_(programming)

    The pattern is called "passing the baton" because a process that releases the resource as well as a freshly reactivated process will activate at most one suspended process, that is, shall "pass the baton to it".

  7. Add or disable 2-step verification for extra security - AOL Help

    help.aol.com/articles/2-step-verification...

    The phone number we contact you with may be different each time. Enable 2-step for phone. 1. Sign in to your Account Security page. 2. Next to "2-Step Verification," click Turn on. 3. Select Phone number for your 2-step verification method. 4. Follow the on-screen prompts to complete the process. Sign in with 2-step for phone. 1.

  8. Fibonacci coding - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_coding

    To encode an integer N: . Find the largest Fibonacci number equal to or less than N; subtract this number from N, keeping track of the remainder.; If the number subtracted was the i th Fibonacci number F(i), put a 1 in place i − 2 in the code word (counting the left most digit as place 0).

  9. AOL Mail

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