Bessel may refer to:

Mathematics and science

Bessel function Bessel functions, named after Friedrich Bessel who was the first to systematically study them in 1824, are canonical solutions of Bessel's differential equation x^2 \frac + x \frac + \left(x^2 - \alpha^2 \right)y = 0 for an arbitrary complex ...

in mathematics * Bessel's inequality in mathematics *

Bessel's correction In statistics, Bessel's correction is the use of ''n'' − 1 instead of ''n'' in the formula for the sample variance and sample standard deviation, where ''n'' is the number of observations in a sample. This method corrects the bias in ...

in statistics * Bessel filter, a linear filter often used in audio crossover systems * Bessel transform, also known as Fourier-Bessel transform or Hankel transform * Bessel window, in signal processing * Besselian date, see Epoch (astronomy)#Besselian years

Places

* Bessel Fjord, NE Greenland * Bessel Fjord, NW Greenland * Bessel (crater), a small lunar crater

People

Surname

* Friedrich Wilhelm Bessel (1784–1846), German mathematician, astronomer, and systematizer of the Bessel functions * Johann Franz Bessel (1672–1749), German Benedictine abbot and historian * Vasily Bessel (1843–1907), Russian music publisher

Given name

* Bessel Kok (born 1941), Dutch businessman and chess organiser * Bessel van der Kolk (born 1943), Dutch psychiatrist

Other uses