5.8.14  The upper incomplete γ function: ugamma

The upper incomplete γ function is defined by

The ugamma command computes the upper incomplete γ function.

• ugamma takes two arguments:
  • a, a number.
  • b, a positive real number.
• ugamma(a,b) returns the value of Γ(a,b).

Examples.

• Input:
  ugamma(3.0,2.0)
  Output:

  1.35335283237

• Input:
  ugamma(-1.3,2)
  Output:

  0.0142127568837