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	waxworms waxxest waxy waxy-faced waxy-looking waxy-skinned waxy-white waxyellow waxyfaced waxylooking waxyskinned waxywhite way way aftward way back way back when way baggage way barley way bennet way bent way fare way forward way freight way in way lead