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  2. Fast Walsh–Hadamard transform - Wikipedia

    en.wikipedia.org/wiki/Fast_Walsh–Hadamard...

    Python example code [ edit ] import math def fwht ( a ) -> None : """In-place Fast Walsh–Hadamard Transform of array a.""" assert math . log2 ( len ( a )) . is_integer (), "length of a is a power of 2" h = 1 while h < len ( a ): # perform FWHT for i in range ( 0 , len ( a ), h * 2 ): for j in range ( i , i + h ): x = a [ j ] y = a [ j + h ] a ...

  3. Inverse function - Wikipedia

    en.wikipedia.org/wiki/Inverse_function

    In keeping with the general notation, some English authors use expressions like sin −1 (x) to denote the inverse of the sine function applied to x (actually a partial inverse; see below). [8] [6] Other authors feel that this may be confused with the notation for the multiplicative inverse of sin (x), which can be denoted as (sin (x)) −1. [6]

  4. NetworkX - Wikipedia

    en.wikipedia.org/wiki/NetworkX

    NetworkX is suitable for operation on large real-world graphs: e.g., graphs in excess of 10 million nodes and 100 million edges. [ clarification needed ] [ 19 ] Due to its dependence on a pure-Python "dictionary of dictionary" data structure, NetworkX is a reasonably efficient, very scalable , highly portable framework for network and social ...

  5. Category of preordered sets - Wikipedia

    en.wikipedia.org/wiki/Category_of_preordered_sets

    There are thus no zero objects in Ord. The categorical product in Ord is given by the product order on the cartesian product. We have a forgetful functor Ord → Set that assigns to each preordered set the underlying set, and to each order-preserving function the underlying function. This functor is faithful, and therefore Ord is a concrete ...

  6. Inverse trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Inverse_trigonometric...

    The most common convention is to name inverse trigonometric functions using an arc- prefix: arcsin(x), arccos(x), arctan(x), etc. [1] (This convention is used throughout this article.) This notation arises from the following geometric relationships: [ citation needed ] when measuring in radians, an angle of θ radians will correspond to an arc ...

  7. Acclaimed singer bludgeoned to death by daughter in her own ...

    www.aol.com/adult-daughter-bludgeons-mother...

    An acclaimed New Jersey singer was bludgeoned to death by her daughter in her New Jersey home while her other teenage daughter was in the house, police and a family member said.

  8. Transpose graph - Wikipedia

    en.wikipedia.org/wiki/Transpose_graph

    A skew-symmetric graph is a graph that is isomorphic to its own transpose graph, via a special kind of isomorphism that pairs up all of the vertices. The converse relation of a binary relation is the relation that reverses the ordering of each pair of related objects. If the relation is interpreted as a directed graph, this is the same thing as ...

  9. Tech journalist putting together investor group to buy ... - AOL

    www.aol.com/tech-journalist-putting-together...

    Musk has since changed the name of the company to X, aiming to create an "everything app." Axios CEO Jim VandHei responded to Swisher's mention of Musk on X, saying: "She expects lots of ...