### 7.3.14 Upper incomplete γ function

The upper incomplete γ function is defined by

Γ(a,b)= | ∫ |
+∞
b
| e−t ta−1 d t.

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

ugamma(3.0,2.0)

1.35335283237 |  |  |  |  |  |  |  |  |  |

ugamma(-1.3,2)

0.0142127568837 |  |  |  |  |  |  |  |  |  |