Definition df-gam 27149

Description: Define the Gamma function. See df-lgam 27148 for more information about the reason for this definition in terms of the log-gamma function. (Contributed by Mario Carneiro, 12-Jul-2014.)

Assertion

Ref	Expression
df-gam	⊢ Γ = (exp ∘ log Γ)

Detailed syntax breakdown of Definition df-gam

Step	Hyp	Ref	Expression
1		cgam 27146	. 2 class Γ
2		ce 16114	. . 3 class exp
3		clgam 27145	. . 3 class log Γ
4	2, 3	ccom 5666	. 2 class (exp ∘ log Γ)
5	1, 4	wceq 1567	1 wff Γ = (exp ∘ log Γ)

This definition is referenced by:  gamf  27172  eflgam  27174