Euler beta function

The Euler beta function has been defined by Euler around 1730 by the so called Euler beta integral

B(x,y)= 0 1t x1(1t) y1dt=Γ(x)Γ(y)Γ(x+y),Rex>0,Rey>0, B(x,y) = \int_0^1 t^{x-1} (1-t)^{y-1} d t = \frac{\Gamma(x)\Gamma(y)}{\Gamma(x+y)},\,\,\,\,\,\,Re x\gt 0, \,\,\,\,Re y \gt 0,

which can be expressed in terms of the gamma function as stated.

A multidimensional generalization is the Selberg integral.

  • G. E. Andrews, R. Askey, R. Roy, Special functions, Enc. of Math. and its Appl. 71, Cambridge Univ. Press 1999
Revised on October 10, 2011 20:50:58 by Zoran Škoda (