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  2. Pseudoelementary class - Wikipedia

    en.wikipedia.org/wiki/Pseudoelementary_class

    The theory with equality of sets under union and intersection, whose structures are of the form (W, ∪, ∩), can be understood naively as the pseudoelementary class formed from the two-sorted elementary class of structures of the form (A, W, ∪, ∩, ∈) where ∈ ⊆ A×W and and ∩ are binary operations (qua ternary relations) on W.

  3. Timsort - Wikipedia

    en.wikipedia.org/wiki/Timsort

    Elements before and after these locations are already in their correct place and do not need to be merged. Then, the smaller of these shrunk runs is copied into temporary memory, and the copied elements are merged with the larger shrunk run into the now free space. If the leftmost shrunk run is smaller, the merge proceeds from left to right.

  4. Pseudorandom number generator - Wikipedia

    en.wikipedia.org/wiki/Pseudorandom_number_generator

    It can be shown that if is a pseudo-random number generator for the uniform distribution on (,) and if is the CDF of some given probability distribution , then is a pseudo-random number generator for , where : (,) is the percentile of , i.e. ():= {: ()}. Intuitively, an arbitrary distribution can be simulated from a simulation of the standard ...

  5. Halton sequence - Wikipedia

    en.wikipedia.org/wiki/Halton_sequence

    Equivalently, the nth number of this sequence is the number n written in binary representation, inverted, and written after the decimal point. This is true for any base. As an example, to find the sixth element of the above sequence, we'd write 6 = 1*2 2 + 1*2 1 + 0*2 0 = 110 2 , which can be inverted and placed after the decimal point to give ...

  6. Primary pseudoperfect number - Wikipedia

    en.wikipedia.org/wiki/Primary_pseudoperfect_number

    Primary pseudoperfect numbers were first investigated and named by Butske, Jaje, and Mayernik (2000). Using computational search techniques, they proved the remarkable result that for each positive integer r up to 8, there exists exactly one primary pseudoperfect number with precisely r (distinct) prime factors, namely, the rth known primary pseudoperfect number.

  7. Pseudocomplement - Wikipedia

    en.wikipedia.org/wiki/Pseudocomplement

    The lattice L itself is called a pseudocomplemented lattice if every element of L is pseudocomplemented. Every pseudocomplemented lattice is necessarily bounded , i.e. it has a 1 as well. Since the pseudocomplement is unique by definition (if it exists), a pseudocomplemented lattice can be endowed with a unary operation * mapping every element ...

  8. Pseudorandomness - Wikipedia

    en.wikipedia.org/wiki/Pseudorandomness

    Before modern computing, researchers requiring random numbers would either generate them through various means (dice, cards, roulette wheels, [5] etc.) or use existing random number tables. The first attempt to provide researchers with a ready supply of random digits was in 1927, when the Cambridge University Press published a table of 41,600 ...

  9. Pseudocode - Wikipedia

    en.wikipedia.org/wiki/Pseudocode

    Pseudocode is commonly used in textbooks and scientific publications related to computer science and numerical computation to describe algorithms in a way that is accessible to programmers regardless of their familiarity with specific programming languages.