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Definition df-bj-pr2 35299
Description: Definition of the second projection of a class tuple. New usage is discouraged because the precise definition is generally unimportant compared to the characteristic properties bj-pr2eq 35300, bj-pr22val 35303, bj-pr2ex 35304. (Contributed by BJ, 6-Oct-2018.) (New usage is discouraged.)
Assertion
Ref Expression
df-bj-pr2 pr2 𝐴 = (1o Proj 𝐴)

Detailed syntax breakdown of Definition df-bj-pr2
StepHypRef Expression
1 cA . . 3 class 𝐴
21bj-cpr2 35298 . 2 class pr2 𝐴
3 c1o 8360 . . 3 class 1o
43, 1bj-cproj 35274 . 2 class (1o Proj 𝐴)
52, 4wceq 1540 1 wff pr2 𝐴 = (1o Proj 𝐴)
Colors of variables: wff setvar class
This definition is referenced by:  bj-pr2eq  35300  bj-pr2un  35301  bj-pr2val  35302  bj-pr2ex  35304
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