Besseln.

/ˈbɛsəl/

Etymology: < the name of F. W. Bessel (1784–1846), German astronomer.

Bessel function n. (also Bessel's function) a solution of Bessel's differential equation x²^d²y/ _dx² + x^dy/ _dx + x² − n²y = 0.

ΘΚΠ

the world > relative properties > number > calculus > [noun] > differential calculus > differential equations > solutions

particular integral1814

Bessel function1872

Mathieu function1915

1872 London, Edinb. & Dublin Philos. Mag. 4th Ser. 44 328 The value of Bessel's functions is becoming generally recognized.

1895 Ann. Math. 9 27 (heading) Roots of the Second Bessel Function.

1963 G. Troup Masers & Lasers (ed. 2) vii. 117 The cut-off parameters u_omfor these modes are the mth roots of the zero order Bessel function J_o.

Derivatives

Beˈsselian adj. (Cent. Dict.,1889).

ΚΠ

1939 Nature 22 July 162/2 Results calculated..by the Besselian method.

This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018).

单词	bessel
释义	Besseln. /ˈbɛsəl/ Etymology: < the name of F. W. Bessel (1784–1846), German astronomer. Bessel function n. (also Bessel's function) a solution of Bessel's differential equation x²^d²y/ _dx² + x^dy/ _dx + x² − n²y = 0. ΘΚΠ the world > relative properties > number > calculus > [noun] > differential calculus > differential equations > solutions particular integral1814 Bessel function1872 Mathieu function1915 1872 London, Edinb. & Dublin Philos. Mag. 4th Ser. 44 328 The value of Bessel's functions is becoming generally recognized. 1895 Ann. Math. 9 27 (heading) Roots of the Second Bessel Function. 1963 G. Troup Masers & Lasers (ed. 2) vii. 117 The cut-off parameters u_omfor these modes are the mth roots of the zero order Bessel function J_o. Derivatives Beˈsselian adj. (Cent. Dict.,1889). ΚΠ 1939 Nature 22 July 162/2 Results calculated..by the Besselian method. This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018). < n.1872
随便看	θ150804 θ150805 θ150806 θ150807 θ150808 θ150809 θ15081 θ150810 θ150811 θ150812 θ150813 θ150814 θ150815 θ150816 θ150817 θ150818 θ150819 θ15082 θ150820 θ150821 θ150822 θ150823 θ150824 θ150825 θ150826