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  2. Amortization calculator - Wikipedia

    en.wikipedia.org/wiki/Amortization_calculator

    The formula for the periodic payment amount is derived as follows. For an amortization schedule, we can define a function p t {\displaystyle p_{t}} that represents the principal amount remaining immediately after the t {\displaystyle t} -th payment is made.

  3. Integer factorization - Wikipedia

    en.wikipedia.org/wiki/Integer_factorization

    Construct an ambiguous form (a, b, c) that is an element f ∈ G Δ of order dividing 2 to obtain a coprime factorization of the largest odd divisor of Δ in which Δ = −4ac or Δ = a(a − 4c) or Δ = (b − 2a)(b + 2a). If the ambiguous form provides a factorization of n then stop, otherwise find another ambiguous form until the ...

  4. Fractional factorial design - Wikipedia

    en.wikipedia.org/wiki/Fractional_factorial_design

    Dropping B results in a full factorial 2 3 design for the factors A, C, and D. Performing the anova using factors A, C, and D, and the interaction terms A:C and A:D, gives the results shown in the table, which are very similar to the results for the full factorial experiment experiment, but have the advantage of requiring only a half-fraction 8 ...

  5. Factorization - Wikipedia

    en.wikipedia.org/wiki/Factorization

    where both factors have integer coefficients (the fact that Q has integer coefficients results from the above formula for the quotient of P(x) by /). Comparing the coefficients of degree n and the constant coefficients in the above equality shows that, if p q {\displaystyle {\tfrac {p}{q}}} is a rational root in reduced form , then q is a ...

  6. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    = 20 411.656 65 kg: carat: kt ≡ 3 + 1 ⁄ 6 gr = 205.196 548 3 mg carat (metric) ct ≡ 200 mg = 200 mg clove: ≡ 8 lb av = 3.628 738 96 kg: crith: ≡ mass of 1 L of hydrogen gas at STP: ≈ 89.9349 mg dalton: Da 1/12 the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest: ≈ 1.660 539 068 ...

  7. Fundamental theorem of arithmetic - Wikipedia

    en.wikipedia.org/wiki/Fundamental_theorem_of...

    This representation is called the canonical representation [10] of n, or the standard form [11] [12] of n. For example, 999 = 3 3 ×37, 1000 = 2 3 ×5 3, 1001 = 7×11×13. Factors p 0 = 1 may be inserted without changing the value of n (for example, 1000 = 2 3 ×3 0 ×5 3).

  8. Rule of 78s - Wikipedia

    en.wikipedia.org/wiki/Rule_of_78s

    At the end of the month, the borrower pays back one $1000 and the $30 interest. During the second month the borrower has use of two $1000 (2/3) amounts and so the payment should be $1000 plus two $10 interest fees. By the third month the borrower has use of one $1000 (1/3) and will pay back this amount plus one $10 interest fees. [4]

  9. Integer factorization records - Wikipedia

    en.wikipedia.org/wiki/Integer_factorization_records

    Integer factorization is the process of determining which prime numbers divide a given positive integer.Doing this quickly has applications in cryptography.The difficulty depends on both the size and form of the number and its prime factors; it is currently very difficult to factorize large semiprimes (and, indeed, most numbers that have no small factors).