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Theorem djurclALT 16561
Description: Shortening of djurcl 7342 using djucllem 16559. (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 6654 . . . . 5 1o ∈ V
2 df-inr 7338 . . . . 5 inr = (𝑥 ∈ V ↦ ⟨1o, 𝑥⟩)
31, 2djucllem 16559 . . . 4 (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ ({1o} × 𝐵))
43olcd 742 . . 3 (𝐶𝐵 → (((inr ↾ 𝐵)‘𝐶) ∈ ({∅} × 𝐴) ∨ ((inr ↾ 𝐵)‘𝐶) ∈ ({1o} × 𝐵)))
5 elun 3359 . . 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 7328 . 2 (𝐴𝐵) = (({∅} × 𝐴) ∪ ({1o} × 𝐵))
86, 7eleqtrrdi 2326 1 (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ (𝐴𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wo 716  wcel 2203  cun 3208  c0 3507  {csn 3688   × cxp 4746  cres 4750  cfv 5351  1oc1o 6639  cdju 7327  inrcinr 7336
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-nul 4235  ax-pow 4286  ax-pr 4321  ax-un 4553
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2814  df-sbc 3042  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-br 4109  df-opab 4171  df-mpt 4172  df-tr 4208  df-id 4413  df-iord 4486  df-on 4488  df-suc 4491  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-res 4760  df-iota 5311  df-fun 5353  df-fv 5359  df-1o 6646  df-dju 7328  df-inr 7338
This theorem is referenced by: (None)
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