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  2. Andrea Amati - Wikipedia

    en.wikipedia.org/wiki/Andrea_Amati

    Andrea Amati (ca. 1505 - 1577, Cremona) was a luthier, from Cremona, Italy. [1] [2] Amati is credited with making the first instruments of the violin family that are in the form we use today. [3] Several of his instruments survive to the present day, and some of them can still be played.

  3. Amati - Wikipedia

    en.wikipedia.org/wiki/Amati

    Makers from nearby Brescia experimented, such as Gasparo da Salò, Micheli, Zanetto and Pellegrino, but it was Andrea Amati who gave the modern violin family their definitive profile. A claim that Andrea Amati received the first order for a violin from Lorenzo de' Medici in 1555 is invalid as Lorenzo de' Medici died in 1492. A number of Andrea ...

  4. Fixed-point logic - Wikipedia

    en.wikipedia.org/wiki/Fixed-point_logic

    For a relational signature X, FO[PFP](X) is the set of formulas formed from X using first-order connectives and predicates, second-order variables as well as a partial fixed point operator used to form formulas of the form [, ⁡], where is a second-order variable, a tuple of first-order variables, a tuple of terms and the lengths of and coincide with the arity of .

  5. Order of approximation - Wikipedia

    en.wikipedia.org/wiki/Order_of_approximation

    First-order approximation is the term scientists use for a slightly better answer. [3] Some simplifying assumptions are made, and when a number is needed, an answer with only one significant figure is often given ("the town has 4 × 10 3, or four thousand, residents"). In the case of a first-order approximation, at least one number given is exact.

  6. Numerical methods for ordinary differential equations - Wikipedia

    en.wikipedia.org/wiki/Numerical_methods_for...

    For example, the second-order equation y′′ = −y can be rewritten as two first-order equations: y′ = z and z′ = −y. In this section, we describe numerical methods for IVPs, and remark that boundary value problems (BVPs) require a different set of tools. In a BVP, one defines values, or components of the solution y at more than one ...

  7. List of Italian inventions and discoveries - Wikipedia

    en.wikipedia.org/wiki/List_of_Italian_inventions...

    The actual invention could have been Roman or Asiatic. Anyway, the system reached a huge diffusion as a consequence of Italian use and theorisation, with Summa de Arithmetica containing the rules of double-entry, the first example of calculating a neperian logarithm as well as early examples of probability calculus. [76]

  8. Violin acoustics - Wikipedia

    en.wikipedia.org/wiki/Violin_acoustics

    Violin acoustics is an area of study within musical acoustics concerned with how the sound of a violin is created as the result of interactions between its many parts.These acoustic qualities are similar to those of other members of the violin family, such as the viola.

  9. List of motorsports points scoring systems - Wikipedia

    en.wikipedia.org/wiki/List_of_motorsports_points...

    Formula Speed: with 2 additional bonus points for pole and 1 bonus point for fastest race lap and 1 bonus point for most positions gained 25 21 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 2014 2016 Formula 1000 [5] with 2 additional bonus points for pole and 1 bonus point for fastest race lap and 1 bonus point for most positions gained 2010: 2024