needle problem
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Buffon's needle — In mathematics, Buffon s needle problem is a question first posed in the 18th century by Georges Louis Leclerc, Comte de Buffon::Suppose we have a floor made of parallel strips of wood, each the same width, and we drop a needle onto the floor.… … Wikipedia
Dreyse needle gun — Needle gun Type Bolt action Place of origin … Wikipedia
Space Needle — Infobox Skyscraper building name = Space Needle built = 1961 1962 use = mixed, tourist attraction caption = Space Needle from Volunteer Park with the EMP building and monorail on bottom. location = Seattle, Washington, United States of America… … Wikipedia
Kakeya set — deltoid. At every stage of its rotation, the needle is in contact with the deltoid at three points: two endpoints (blue) and one tangent point (black).The needle s midpoint (red) describes a circle with diameter equal to half the length of the… … Wikipedia
Pi — This article is about the number. For the Greek letter, see Pi (letter). For other uses, see Pi (disambiguation). The circumference of a ci … Wikipedia
Problème de l'aiguille de Kakeya — Ne doit pas être confondu avec Aiguille de Buffon. Aiguille montrée en rotation à l intérieur d une deltoïde (qui est donc un ensemble de Kakeya). À chaque étape de sa rotation, l aiguille est en contact avec la courbe en trois points … Wikipédia en Français
List of combinatorics topics — This is a list of combinatorics topics.A few decades ago it might have been said that combinatorics is little more than a way to classify poorly understood problems, and some standard remedies. Great progress has been made since 1960.This page is … Wikipedia
Spijker's lemma — In mathematics, Spijker s lemma is a result in the theory of rational mappings of the Riemann sphere. It states that the image of a circle under a complex rational map with numerator and denominator having degree at most n has length at most 2 n… … Wikipedia
Pi — Pour les articles homonymes, voir Pi (homonymie). Si le diamètre du cercle est 1, sa circonférence est π. Pi[1 … Wikipédia en Français
Número π — π (pi) es la relación entre la longitud de una circunferencia y su diámetro, en geometría euclidiana. Es un número irracional y una de las constantes matemáticas más importantes. Se emplea frecuentemente en matemáticas, física e ingeniería. El… … Wikipedia Español
Abram Samoilovitch Besicovitch — Infobox Scientist name = A. S. Besicovitch image width = 220px caption = Abram Samoilovitch Besicovitch birth date = birth date|1891|1|24|df=y birth place = Berdyansk, Russia residence = flag|United Kingdom nationality = flag|Russian flag|United… … Wikipedia