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  2. Compositional data - Wikipedia

    en.wikipedia.org/wiki/Compositional_data

    3.2 Linear transformations. ... Download as PDF; Printable version; ... Compositional data in three variables can be plotted via ternary plots.

  3. Green's function for the three-variable Laplace equation

    en.wikipedia.org/wiki/Green's_function_for_the...

    Because is a linear differential operator, the solution () to a general system of this type can be written as an integral over a distribution of source given by (): = (, ′) (′) ′ where the Green's function for Laplacian in three variables (, ′) describes the response of the system at the point to a point source located at ...

  4. Laplace–Stieltjes transform - Wikipedia

    en.wikipedia.org/wiki/Laplace–Stieltjes_transform

    The Laplace–Stieltjes transform of a real-valued function g is given by a Lebesgue–Stieltjes integral of the form ()for s a complex number.As with the usual Laplace transform, one gets a slightly different transform depending on the domain of integration, and for the integral to be defined, one also needs to require that g be of bounded variation on the region of integration.

  5. Detailed balance - Wikipedia

    en.wikipedia.org/wiki/Detailed_balance

    A Markov process is called a reversible Markov process or reversible Markov chain if there exists a positive stationary distribution π that satisfies the detailed balance equations [13] =, where P ij is the Markov transition probability from state i to state j, i.e. P ij = P(X t = j | X t − 1 = i), and π i and π j are the equilibrium probabilities of being in states i and j, respectively ...

  6. Convolution of probability distributions - Wikipedia

    en.wikipedia.org/wiki/Convolution_of_probability...

    The probability distribution of the sum of two or more independent random variables is the convolution of their individual distributions. The term is motivated by the fact that the probability mass function or probability density function of a sum of independent random variables is the convolution of their corresponding probability mass functions or probability density functions respectively.

  7. Integral transform - Wikipedia

    en.wikipedia.org/wiki/Integral_transform

    An integral transform is any transform of the following form: () = (,)The input of this transform is a function, and the output is another function .An integral transform is a particular kind of mathematical operator.

  8. Change of variables - Wikipedia

    en.wikipedia.org/wiki/Change_of_variables

    Variable changes for differentiation and integration are taught in elementary calculus and the steps are rarely carried out in full. The very broad use of variable changes is apparent when considering differential equations, where the independent variables may be changed using the chain rule or the dependent variables are changed resulting in ...

  9. Girsanov theorem - Wikipedia

    en.wikipedia.org/wiki/Girsanov_theorem

    The density transformation from P to Q is given by the Girsanov theorem. In probability theory , Girsanov's theorem or the Cameron-Martin-Girsanov theorem explains how stochastic processes change under changes in measure .