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1 天前 · Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...
3 天前 · where denotes the least upper bound (or supremum) of the set. Lyapunov CLT In this variant of the central limit theorem the random variables have to be independent, but not necessarily identically distributed. The theorem also requires that random variables | | have moments of some order (+), and that the rate of growth of these moments is limited by the Lyapunov condition given below.
1 天前 · The Statue of Liberty (Liberty Enlightening the World; French: La Liberté éclairant le monde) is a colossal neoclassical sculpture on Liberty Island in New York Harbor, within New York City.The copper statue, a gift to the U.S. from the people of France, was designed by French sculptor Frédéric Auguste Bartholdi and its metal framework was built by Gustave Eiffel.
1 天前 · This is a list of countries and dependencies by population. It includes sovereign states, inhabited dependent territories and, in some cases, constituent countries of sovereign states, with inclusion within the list being primarily based on the ISO standard ISO 3166-1. For instance, the United Kingdom is considered a single entity, while the ...
2 天前 · Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.
1 天前 · Four is the smallest composite number, its proper divisors being 1 and 2. [4] Four is the sum and product of two with itself: , the only non-zero number such that , which also makes four the smallest and only even squared prime number and hence the first squared prime of the form , where is a prime.
20 小時前 · A phylogeny of the extant ant subfamilies. *Cerapachyinae is paraphyletic ‡ The previous dorylomorph subfamilies - Ecitoninae, Aenictinae, Aenictogitoninae, Cerapachyinae, Leptanilloidinae - were synonymized under Dorylinae by Brady et al. in 2014 Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. ...
