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Theorem djurclALT 14694
Description: Shortening of djurcl 7054 using djucllem 14692. (Contributed by BJ, 4-Jul-2022.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
djurclALT (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ (𝐴𝐵))

Proof of Theorem djurclALT
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 1oex 6428 . . . . 5 1o ∈ V
2 df-inr 7050 . . . . 5 inr = (𝑥 ∈ V ↦ ⟨1o, 𝑥⟩)
31, 2djucllem 14692 . . . 4 (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ ({1o} × 𝐵))
43olcd 734 . . 3 (𝐶𝐵 → (((inr ↾ 𝐵)‘𝐶) ∈ ({∅} × 𝐴) ∨ ((inr ↾ 𝐵)‘𝐶) ∈ ({1o} × 𝐵)))
5 elun 3278 . . 3 (((inr ↾ 𝐵)‘𝐶) ∈ (({∅} × 𝐴) ∪ ({1o} × 𝐵)) ↔ (((inr ↾ 𝐵)‘𝐶) ∈ ({∅} × 𝐴) ∨ ((inr ↾ 𝐵)‘𝐶) ∈ ({1o} × 𝐵)))
64, 5sylibr 134 . 2 (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ (({∅} × 𝐴) ∪ ({1o} × 𝐵)))
7 df-dju 7040 . 2 (𝐴𝐵) = (({∅} × 𝐴) ∪ ({1o} × 𝐵))
86, 7eleqtrrdi 2271 1 (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ (𝐴𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wo 708  wcel 2148  cun 3129  c0 3424  {csn 3594   × cxp 4626  cres 4630  cfv 5218  1oc1o 6413  cdju 7039  inrcinr 7048
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-sep 4123  ax-nul 4131  ax-pow 4176  ax-pr 4211  ax-un 4435
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2741  df-sbc 2965  df-dif 3133  df-un 3135  df-in 3137  df-ss 3144  df-nul 3425  df-pw 3579  df-sn 3600  df-pr 3601  df-op 3603  df-uni 3812  df-br 4006  df-opab 4067  df-mpt 4068  df-tr 4104  df-id 4295  df-iord 4368  df-on 4370  df-suc 4373  df-xp 4634  df-rel 4635  df-cnv 4636  df-co 4637  df-dm 4638  df-res 4640  df-iota 5180  df-fun 5220  df-fv 5226  df-1o 6420  df-dju 7040  df-inr 7050
This theorem is referenced by: (None)
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