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# scipy.special.gdtr

`scipy.special.``gdtr`(a, b, x) = <ufunc 'gdtr'>

  Gamma distribution cumulative density function.

  Returns the integral from zero to x of the gamma probability density function:

      a**b / gamma(b) * integral(t**(b-1) exp(-at), t=0..x).

  The arguments a and b are used differently here than in other definitions.