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Theorem djurclALT 16623
Description: Shortening of djurcl 7345 using djucllem 16621. (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 6657 . . . . 5 1o ∈ V
2 df-inr 7341 . . . . 5 inr = (𝑥 ∈ V ↦ ⟨1o, 𝑥⟩)
31, 2djucllem 16621 . . . 4 (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ ({1o} × 𝐵))
43olcd 742 . . 3 (𝐶𝐵 → (((inr ↾ 𝐵)‘𝐶) ∈ ({∅} × 𝐴) ∨ ((inr ↾ 𝐵)‘𝐶) ∈ ({1o} × 𝐵)))
5 elun 3362 . . 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 7331 . 2 (𝐴𝐵) = (({∅} × 𝐴) ∪ ({1o} × 𝐵))
86, 7eleqtrrdi 2328 1 (𝐶𝐵 → ((inr ↾ 𝐵)‘𝐶) ∈ (𝐴𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wo 716  wcel 2205  cun 3211  c0 3510  {csn 3691   × cxp 4749  cres 4753  cfv 5354  1oc1o 6642  cdju 7330  inrcinr 7339
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 2207  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-nul 4238  ax-pow 4289  ax-pr 4324  ax-un 4556
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-sbc 3045  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-br 4112  df-opab 4174  df-mpt 4175  df-tr 4211  df-id 4416  df-iord 4489  df-on 4491  df-suc 4494  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-res 4763  df-iota 5314  df-fun 5356  df-fv 5362  df-1o 6649  df-dju 7331  df-inr 7341
This theorem is referenced by: (None)
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