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  2. If and only if - Wikipedia

    en.wikipedia.org/wiki/If_and_only_if

    The corresponding logical symbols are "", "", [6] and , [10] and sometimes "iff".These are usually treated as equivalent. However, some texts of mathematical logic (particularly those on first-order logic, rather than propositional logic) make a distinction between these, in which the first, ↔, is used as a symbol in logic formulas, while ⇔ is used in reasoning about those logic formulas ...

  3. Formula calculator - Wikipedia

    en.wikipedia.org/wiki/Formula_calculator

    A formula calculator is a software calculator that can perform a calculation in two steps: Enter the calculation by typing it in from the keyboard.

  4. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    where C is the circumference of a circle, d is the diameter, and r is the radius.More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width.

  5. List of limits - Wikipedia

    en.wikipedia.org/wiki/List_of_limits

    In these limits, the infinitesimal change is often denoted or .If () is differentiable at , (+) = ′ ().This is the definition of the derivative.All differentiation rules can also be reframed as rules involving limits.

  6. Life Racing Engines - Wikipedia

    en.wikipedia.org/wiki/Life_Racing_Engines

    Life was a Formula One constructor from Modena, Italy. The company was named for its founder, Ernesto Vita ("Vita" is Italian for "Life"). [1] Life first emerged on the Formula One scene in 1990, trying to market their unconventional W12 3.5-litre engine.

  7. Multiplication theorem - Wikipedia

    en.wikipedia.org/wiki/Multiplication_theorem

    for integer k ≥ 1, and is sometimes called Gauss's multiplication formula, in honour of Carl Friedrich Gauss. The multiplication theorem for the gamma functions can be understood to be a special case, for the trivial Dirichlet character , of the Chowla–Selberg formula .

  8. Formula - Wikipedia

    en.wikipedia.org/wiki/Formula

    A molecular formula enumerates the number of atoms to reflect those in the molecule, so that the molecular formula for glucose is C 6 H 12 O 6 rather than the glucose empirical formula, which is CH 2 O. Except for the very simple substances, molecular chemical formulas generally lack needed structural information, and might even be ambiguous in ...

  9. List of Formula One Grands Prix - Wikipedia

    en.wikipedia.org/wiki/List_of_Formula_One_Grands...

    The "formula" in the name alludes to a series of FIA rules to which all participants and vehicles are required to conform. [ 1 ] [ 2 ] The Formula One World Championship season consists of a series of races around the world, known as Grands Prix, usually held on purpose-built circuits , and in a few cases on closed city streets . [ 3 ]