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  2. Implied volatility - Wikipedia

    en.wikipedia.org/wiki/Implied_volatility

    Grunspan, C. (2011), "A Note on the Equivalence between the Normal and the Lognormal Implied Volatility: A Model Free Approach", SSRN 1894652; Grunspan, C. (2011), "Asymptotics Expansions for the Implied Lognormal Volatility in a Model Free Approach", SSRN 1965977; Trippi, Robert (1978). "Stock Volatility Expectations Implied by Option Premia".

  3. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable.The general form of its probability density function is [2] [3] = ().

  4. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    a b c = a (b c), which typically is not equal to (a b) c. This convention is useful because there is a property of exponentiation that (a b) c = a bc, so it's unnecessary to use serial exponentiation for this. However, when exponentiation is represented by an explicit symbol such as a caret (^) or arrow (↑), there is no common standard.

  5. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    Together with the equation defining K a, there are now three equations in three unknowns. When an acid is dissolved in water C A = C H = C a , the concentration of the acid, so [A] = [H]. After some further algebraic manipulation an equation in the hydrogen ion concentration may be obtained.

  6. Pell's equation - Wikipedia

    en.wikipedia.org/wiki/Pell's_equation

    Pell's equation, also called the Pell–Fermat equation, is any Diophantine equation of the form =, where n is a given positive nonsquare integer, and integer solutions are sought for x and y. In Cartesian coordinates , the equation is represented by a hyperbola ; solutions occur wherever the curve passes through a point whose x and y ...

  7. Ordinal priority approach - Wikipedia

    en.wikipedia.org/wiki/Ordinal_priority_approach

    Also, there are two criteria called cost (c), and construction quality (q) for buying the house. On the other hand, there are three houses (h1, h2, h3) for purchasing. The first expert (x) has three years of working experience and the second expert (y) has two years of working experience .

  8. Nanoindentation - Wikipedia

    en.wikipedia.org/wiki/Nanoindentation

    The last equation indicates that the fields ∆ kl and ∆ ˙ ij can be solved as a linear elastic problem with the elastic spring elements in the original viscoelastic network model while the dashpot elements are ignored. The solution for a given test geometry is a linear relation between the step changes in the load and displacement rates at ...