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- DictionaryBes·sel, Friedrich Wilhelm/ˈbesəl/
- 1. (1784–1846), German astronomer and mathematician. He determined the positions of about 75,000 stars, obtained accurate measurements of stellar distances, and, following a study of the orbit of Uranus, predicted the existence of an eighth planet.
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4 days ago · A Bessel equation is a special case of a confluent hypergeometric equation. The Bessel function of the first kind of order ν: where Γ(z) = ∫∞0xz − 1e − xdx is the gamma function. There are two Bessel functions of the second kind of order ν: one is called the Weber function: Yν(x) = cosνπJν(x) − J − ν(x) sinνπ.
1 day ago · Betelgeuse, α Ori, 58 Ori, HR 2061, BD +7°1055, HD 39801, FK5 224, HIP 27989, SAO 113271, GC 7451, CCDM J05552+0724, AAVSO 0549+07. Database references. SIMBAD. data. Betelgeuse is a red supergiant star in the constellation of Orion. It is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in its ...
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5 days ago · Peter Andreas Hansen (1795--1874), a German astronomer, was the first who discovered in 1843 the generating function for the Bessel functions of the first kind: ex(z−1/z)/2 = ∑n=−∞∞ znJn(x) e x ( z − 1 / z) / 2 = ∑ n = − ∞ ∞ z n J n ( x) Hansen became director of the Seeberg Observatory, near Gotha, in 1825, and in 1857 a ...
2 days ago · Orthogonality of Bessel's functions. For any real number α ∈ ℝ, the Bessel equation with a parameter. has a bounded solution. which can be justified by direct substitution. For two distinct positive numbers k1 and k2, we consider two functions. ϕ1(x) = Jν(k1x) and ϕ2(x) = Jν(k2x).
2 days ago · Johann Carl Friedrich Gauss (German: Gauß [kaʁl ˈfʁiːdʁɪç ˈɡaʊs] ⓘ; [2] [3] Latin: Carolus Fridericus Gauss; 30 April 1777 – 23 February 1855) was a German mathematician, astronomer, geodesist, and physicist who contributed to many fields in mathematics and science. He ranks among history's most influential mathematicians and has ...
- Mathematics and sciences
3 days ago · As both Academia for Equality (A4E) and the British Society for Middle Eastern Studies (BRISMES) have already noted, the process The Alexander von Humboldt Foundation adopted for choosing the winners of its Friedrich Wilhelm Bessel Research Award -- specifically the treatment of nominee Huda Fakhreddine -- are deeply concerning in an institution claiming to support…
2 days ago · Learn how to say ''Friedrich Carl von Savigny'' in German with this short pronunciation tutorial.
- 1 min
- German Pronunciation
