It generalizes the factorial function n It appears in the method of steepest descent (a method for obtaining the asymptotic expansion of a class of integrals). Later, euler notices that due to his gamma function derivatives and integrals of fractional orders may have a meaning However, the first formal development of the subject comes in nineteenth century with the contributions of riemann, liouville, grΓΌnwald and letnikov, and since than results have been accumulated in various branches of mathematics. For Non-Integer Values of π The Gamma function for positive no-integer values of π the defining integral [Eq. (1)] has been evaluated numerical for π<π<π and this table can be extended to all positive value of πby repeated use of Eq. (3) as shown: ππβπ=πππβπ=ππ+πππβπ πππ.
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