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  2. Annuity - Wikipedia

    en.wikipedia.org/wiki/Annuity

    In investment, an annuity is a series of payments made at equal intervals. [1] Examples of annuities are regular deposits to a savings account, monthly home mortgage payments, monthly insurance payments and pension payments.

  3. Horn-satisfiability - Wikipedia

    en.wikipedia.org/wiki/Horn-satisfiability

    A Horn formula is a propositional formula formed by conjunction of Horn clauses. Horn satisfiability is actually one of the "hardest" or "most expressive" problems which is known to be computable in polynomial time, in the sense that it is a P -complete problem. [ 2 ]

  4. Pearson correlation coefficient - Wikipedia

    en.wikipedia.org/wiki/Pearson_correlation...

    Pearson's correlation coefficient, when applied to a sample, is commonly represented by and may be referred to as the sample correlation coefficient or the sample Pearson correlation coefficient. We can obtain a formula for r x y {\displaystyle r_{xy}} by substituting estimates of the covariances and variances based on a sample into the formula ...

  5. List of equations - Wikipedia

    en.wikipedia.org/wiki/List_of_equations

    Kirchhoff's diffraction formula; Klein–Gordon equation; Korteweg–de Vries equation; Landau–Lifshitz–Gilbert equation; Lane–Emden equation; Langevin equation; Levy–Mises equations; Lindblad equation; Lorentz equation; Maxwell's equations; Maxwell's relations; Newton's laws of motion; Navier–Stokes equations; Reynolds-averaged ...

  6. Satisfiability - Wikipedia

    en.wikipedia.org/wiki/Satisfiability

    For example, the formula + = is satisfiable because it is true when = and =, while the formula + = is not satisfiable over the integers. The dual concept to satisfiability is validity ; a formula is valid if every assignment of values to its variables makes the formula true.

  7. Kuder–Richardson formulas - Wikipedia

    en.wikipedia.org/wiki/Kuder–Richardson_formulas

    The name of this formula stems from the fact that is the twentieth formula discussed in Kuder and Richardson's seminal paper on test reliability. [1] It is a special case of Cronbach's α, computed for dichotomous scores. [2] [3] It is often claimed that a high KR-20 coefficient (e.g., > 0.90) indicates a homogeneous test. However, like ...

  8. Inclusion–exclusion principle - Wikipedia

    en.wikipedia.org/wiki/Inclusion–exclusion...

    The principle can be viewed as an example of the sieve method extensively used in number theory and is sometimes referred to as the sieve formula. [ 4 ] As finite probabilities are computed as counts relative to the cardinality of the probability space , the formulas for the principle of inclusion–exclusion remain valid when the cardinalities ...

  9. Chart of accounts - Wikipedia

    en.wikipedia.org/wiki/Chart_of_accounts

    A liability is a present obligation of an entity to transfer an economic benefit (CF E37). Common examples of liability accounts include accounts payable, deferred revenue, bank loans, bonds payable and lease obligations. Equity accounts are used to recognize ownership equity. The terms equity [for profit enterprise] or net assets [not-for ...