Database
SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for BJ
Set theory
Tuples of classes
bj-cpr2
Next ⟩
df-bj-pr2
Metamath Proof Explorer
Ascii
Structured
Syntax definition
bj-cpr2
Description:
Syntax for the second class tuple projection.
(Contributed by
BJ
, 6-Oct-2018)
Ref
Expression
Assertion
bj-cpr2
class
pr
2
𝐴