Examples of calculation errors
in gamma function.

Calculated value ƒ¡(0.001)=999.4235
      True value ƒ¡(0.001)=999.4239

Calculated value ƒ¡(0.01)=99.43256
      True value ƒ¡(0.01)=99.43260

Calculated value ƒ¡(0.1)=9.513506
      True value ƒ¡(0.1)=9.513509

Calculated value ƒ¡(0.2)=4.5908428
      True value ƒ¡(0.2)=4.5908445

Calculated value ƒ¡(0.3)=2.9915684
      True value ƒ¡(0.3)=2.9915693

Calculated value ƒ¡(0.5)=1.7724536
      True value ƒ¡(0.5)=1.7724539

Calculated value ƒ¡(0.7)=1.298055
      True value ƒ¡(0.7)=1.298052

Calculated value ƒ¡(1.0)=0.99999990
      True value ƒ¡(1.0)=1

Calculated value ƒ¡(1.5)=0.88622687
      True value ƒ¡(1.5)=0.88622692

Calculated value ƒ¡(2.0)=0.99999995
      True value ƒ¡(2.0)=1


Referring example of calculation 
error in beta function. 
If x=1 and y=1, then
Calculated value B(x,y)=0.9999998
      True value B(x,y)=1