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Definition df-bj-2upl 34463
 Description: Definition of the Morse couple. See df-bj-1upl 34450. New usage is discouraged because the precise definition is generally unimportant compared to the characteristic properties bj-2upleq 34464, bj-2uplth 34473, bj-2uplex 34474, and the properties of the projections (see df-bj-pr1 34453 and df-bj-pr2 34467). (Contributed by BJ, 6-Oct-2018.) (New usage is discouraged.)
Assertion
Ref Expression
df-bj-2upl 𝐴, 𝐵⦆ = (⦅𝐴⦆ ∪ ({1o} × tag 𝐵))

Detailed syntax breakdown of Definition df-bj-2upl
StepHypRef Expression
1 cA . . 3 class 𝐴
2 cB . . 3 class 𝐵
31, 2bj-c2uple 34462 . 2 class 𝐴, 𝐵
41bj-c1upl 34449 . . 3 class 𝐴
5 c1o 8080 . . . . 5 class 1o
65csn 4525 . . . 4 class {1o}
72bj-ctag 34426 . . . 4 class tag 𝐵
86, 7cxp 5517 . . 3 class ({1o} × tag 𝐵)
94, 8cun 3879 . 2 class (⦅𝐴⦆ ∪ ({1o} × tag 𝐵))
103, 9wceq 1538 1 wff 𝐴, 𝐵⦆ = (⦅𝐴⦆ ∪ ({1o} × tag 𝐵))
 Colors of variables: wff setvar class This definition is referenced by:  bj-2upleq  34464  bj-pr21val  34465  bj-pr22val  34471  bj-2uplex  34474  bj-2upln0  34475  bj-2upln1upl  34476
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