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  2. Lonely runner conjecture - Wikipedia

    en.wikipedia.org/wiki/Lonely_runner_conjecture

    In graph theory, a distance graph on the set of integers, and using some finite set of positive integer distances, has an edge between , if and only if | |. For example, if D = { 2 } {\displaystyle D=\{2\}} , every consecutive pair of even integers, and of odd integers, is adjacent, all together forming two connected components .

  3. Tangential speed - Wikipedia

    en.wikipedia.org/wiki/Tangential_speed

    When proper units are used for tangential speed v, rotational speed ω, and radial distance r, the direct proportion of v to both r and ω becomes the exact equation =. This comes from the following: the linear (tangential) velocity of an object in rotation is the rate at which it covers the circumference's length:

  4. Distance (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Distance_(graph_theory)

    A metric space defined over a set of points in terms of distances in a graph defined over the set is called a graph metric. The vertex set (of an undirected graph) and the distance function form a metric space, if and only if the graph is connected. The eccentricity ϵ(v) of a vertex v is the greatest distance between v and any other vertex; in ...

  5. Hadwiger–Nelson problem - Wikipedia

    en.wikipedia.org/wiki/Hadwiger–Nelson_problem

    According to Jensen & Toft (1995), the problem was first formulated by Nelson in 1950, and first published by Gardner (1960). Hadwiger (1945) had earlier published a related result, showing that any cover of the plane by five congruent closed sets contains a unit distance in one of the sets, and he also mentioned the problem in a later paper (Hadwiger 1961).

  6. Periodic function - Wikipedia

    en.wikipedia.org/wiki/Periodic_function

    A function with period P will repeat on intervals of length P, and these intervals are sometimes also referred to as periods of the function. Geometrically, a periodic function can be defined as a function whose graph exhibits translational symmetry , i.e. a function f is periodic with period P if the graph of f is invariant under translation ...

  7. CORDIC - Wikipedia

    en.wikipedia.org/wiki/CORDIC

    CORDIC (coordinate rotation digital computer), Volder's algorithm, Digit-by-digit method, Circular CORDIC (Jack E. Volder), [1] [2] Linear CORDIC, Hyperbolic CORDIC (John Stephen Walther), [3] [4] and Generalized Hyperbolic CORDIC (GH CORDIC) (Yuanyong Luo et al.), [5] [6] is a simple and efficient algorithm to calculate trigonometric functions, hyperbolic functions, square roots ...

  8. Matt Gaetz ethics report released: What to know about Florida ...

    www.aol.com/matt-gaetz-ethics-report-released...

    According to a lawyer for two of the women who testified in the House Ethics Committee investigation, Gaetz dropped his sexual relationship with the girl once he learned she was a minor.

  9. Rapidity - Wikipedia

    en.wikipedia.org/wiki/Rapidity

    Mathematically, rapidity can be defined as the hyperbolic angle that differentiates two frames of reference in relative motion, each frame being associated with distance and time coordinates. Using the inverse hyperbolic function artanh, the rapidity w corresponding to velocity v is w = artanh(v/c) where c is the speed of light.