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Definition df-fix 31135
Description: Define the class of all fixpoints of a relationship. (Contributed by Scott Fenton, 11-Apr-2012.)
Assertion
Ref Expression
df-fix Fix 𝐴 = dom (𝐴 ∩ I )

Detailed syntax breakdown of Definition df-fix
StepHypRef Expression
1 cA . . 3 class 𝐴
21cfix 31111 . 2 class Fix 𝐴
3 cid 4948 . . . 4 class I
41, 3cin 3539 . . 3 class (𝐴 ∩ I )
54cdm 5038 . 2 class dom (𝐴 ∩ I )
62, 5wceq 1475 1 wff Fix 𝐴 = dom (𝐴 ∩ I )
Colors of variables: wff setvar class
This definition is referenced by:  elfix  31180  fixssdm  31183  fixun  31186
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