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  2. Green card (IBM/360) - Wikipedia

    en.wikipedia.org/wiki/Green_card_(IBM/360)

    The card was published by IBM and was available by mail order directly from IBM, from university book stores associated with IBM 360 systems, some technical book stores, and other sellers of published technical material. Page 8 of the card provides both the then mailing address to contact for pricing and the part number of GX20-1703. [1]

  3. Renewal theory - Wikipedia

    en.wikipedia.org/wiki/Renewal_theory

    Renewal theory is the branch of probability theory that generalizes the Poisson process for arbitrary holding times. Instead of exponentially distributed holding times, a renewal process may have any independent and identically distributed (IID) holding times that have finite mean.

  4. Order statistic - Wikipedia

    en.wikipedia.org/wiki/Order_statistic

    When the random variables X 1, X 2, ..., X n form a sample they are independent and identically distributed. This is the case treated below. This is the case treated below. In general, the random variables X 1 , ..., X n can arise by sampling from more than one population.

  5. Row- and column-major order - Wikipedia

    en.wikipedia.org/wiki/Row-_and_column-major_order

    More generally, there are d! possible orders for a given array, one for each permutation of dimensions (with row-major and column-order just 2 special cases), although the lists of stride values are not necessarily permutations of each other, e.g., in the 2-by-3 example above, the strides are (3,1) for row-major and (1,2) for column-major.

  6. Degrees of freedom (statistics) - Wikipedia

    en.wikipedia.org/wiki/Degrees_of_freedom...

    However, once you know the first n − 1 components, the constraint tells you the value of the nth component. Therefore, this vector has n − 1 degrees of freedom. Mathematically, the first vector is the oblique projection of the data vector onto the subspace spanned by the vector of 1's. The 1 degree of freedom is the dimension of this subspace.

  7. pandas (software) - Wikipedia

    en.wikipedia.org/wiki/Pandas_(software)

    Pandas is built around data structures called Series and DataFrames. Data for these collections can be imported from various file formats such as comma-separated values, JSON, Parquet, SQL database tables or queries, and Microsoft Excel. [8] A Series is a 1-dimensional data structure built on top of NumPy's array.

  8. Green's function - Wikipedia

    en.wikipedia.org/wiki/Green's_function

    Green's functions are also useful tools in solving wave equations and diffusion equations. In quantum mechanics, Green's function of the Hamiltonian is a key concept with important links to the concept of density of states. The Green's function as used in physics is usually defined with the opposite sign, instead.

  9. Markov renewal process - Wikipedia

    en.wikipedia.org/wiki/Markov_renewal_process

    Markov renewal processes are a class of random processes in probability and statistics that generalize the class of Markov jump processes.Other classes of random processes, such as Markov chains and Poisson processes, can be derived as special cases among the class of Markov renewal processes, while Markov renewal processes are special cases among the more general class of renewal processes.