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6 天前 · Bessel functions, first defined by the mathematician Daniel Bernoulli and then generalized by Friedrich Bessel, are canonical solutions y(x) of Bessel's differential equation. for an arbitrary complex number , which represents the order of the Bessel function.
3 天前 · Star Wars: Episode I – The Phantom Menace is a 1999 American epic space opera film written and directed by George Lucas. It stars Liam Neeson, Ewan McGregor, Natalie Portman, Jake Lloyd, Ahmed Best, Ian McDiarmid, Anthony Daniels, Kenny Baker, Pernilla August, and Frank Oz.
4 天前 · Transformers is a series of science fiction action films based on the Transformers franchise. [note 1] Michael Bay directed the first five live action films: Transformers (2007), Revenge of the Fallen (2009), Dark of the Moon (2011), Age of Extinction (2014), and The Last Knight (2017), [1] [2] [3] and has served as a producer for subsequent films.
2 天前 · Stonehenge is a prehistoric megalithic structure on Salisbury Plain in Wiltshire, England, two miles (3 km) west of Amesbury. It consists of an outer ring of vertical sarsen standing stones, each around 13 feet (4.0 m) high, seven feet (2.1 m) wide, and weighing around 25 tons, topped by connecting horizontal lintel stones.
2 天前 · The swastika ( 卐 or 卍) is an ancient religious and cultural symbol, predominantly found in various Eurasian cultures, as well as some African and American ones. In the western world it is more widely recognized as a symbol of the German Nazi Party who appropriated it from Asian cultures starting in the early 20th century.
5 天前 · Start of dynastic rule. A depiction of Yu, the initiator of dynastic rule in China, by the Southern Song court painter Ma Lin. As the founder of China's first orthodox dynasty, the Xia dynasty, Yu the Great is conventionally regarded as the inaugurator of dynastic rule in China.
5 天前 · The number π (/paɪ/; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics. It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, although ...
