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Theorem djudom 7194
Description: Dominance law for disjoint union. (Contributed by Jim Kingdon, 25-Jul-2022.)
Assertion
Ref Expression
djudom ((𝐴𝐵𝐶𝐷) → (𝐴𝐶) ≼ (𝐵𝐷))

Proof of Theorem djudom
Dummy variables 𝑓 𝑔 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 brdomi 6837 . . 3 (𝐴𝐵 → ∃𝑓 𝑓:𝐴1-1𝐵)
21adantr 276 . 2 ((𝐴𝐵𝐶𝐷) → ∃𝑓 𝑓:𝐴1-1𝐵)
3 brdomi 6837 . . . 4 (𝐶𝐷 → ∃𝑔 𝑔:𝐶1-1𝐷)
43ad2antlr 489 . . 3 (((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) → ∃𝑔 𝑔:𝐶1-1𝐷)
5 inlresf1 7162 . . . . . . . . 9 (inl ↾ 𝐵):𝐵1-1→(𝐵𝐷)
6 simplr 528 . . . . . . . . 9 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → 𝑓:𝐴1-1𝐵)
7 f1co 5492 . . . . . . . . 9 (((inl ↾ 𝐵):𝐵1-1→(𝐵𝐷) ∧ 𝑓:𝐴1-1𝐵) → ((inl ↾ 𝐵) ∘ 𝑓):𝐴1-1→(𝐵𝐷))
85, 6, 7sylancr 414 . . . . . . . 8 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ((inl ↾ 𝐵) ∘ 𝑓):𝐴1-1→(𝐵𝐷))
9 inrresf1 7163 . . . . . . . . 9 (inr ↾ 𝐷):𝐷1-1→(𝐵𝐷)
10 simpr 110 . . . . . . . . 9 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → 𝑔:𝐶1-1𝐷)
11 f1co 5492 . . . . . . . . 9 (((inr ↾ 𝐷):𝐷1-1→(𝐵𝐷) ∧ 𝑔:𝐶1-1𝐷) → ((inr ↾ 𝐷) ∘ 𝑔):𝐶1-1→(𝐵𝐷))
129, 10, 11sylancr 414 . . . . . . . 8 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ((inr ↾ 𝐷) ∘ 𝑔):𝐶1-1→(𝐵𝐷))
13 rnco 5188 . . . . . . . . . . 11 ran ((inl ↾ 𝐵) ∘ 𝑓) = ran ((inl ↾ 𝐵) ↾ ran 𝑓)
14 f1rn 5481 . . . . . . . . . . . . . 14 (𝑓:𝐴1-1𝐵 → ran 𝑓𝐵)
1514ad2antlr 489 . . . . . . . . . . . . 13 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ran 𝑓𝐵)
16 resabs1 4987 . . . . . . . . . . . . 13 (ran 𝑓𝐵 → ((inl ↾ 𝐵) ↾ ran 𝑓) = (inl ↾ ran 𝑓))
1715, 16syl 14 . . . . . . . . . . . 12 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ((inl ↾ 𝐵) ↾ ran 𝑓) = (inl ↾ ran 𝑓))
1817rneqd 4906 . . . . . . . . . . 11 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ran ((inl ↾ 𝐵) ↾ ran 𝑓) = ran (inl ↾ ran 𝑓))
1913, 18eqtrid 2249 . . . . . . . . . 10 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ran ((inl ↾ 𝐵) ∘ 𝑓) = ran (inl ↾ ran 𝑓))
20 rnco 5188 . . . . . . . . . . 11 ran ((inr ↾ 𝐷) ∘ 𝑔) = ran ((inr ↾ 𝐷) ↾ ran 𝑔)
21 f1rn 5481 . . . . . . . . . . . . 13 (𝑔:𝐶1-1𝐷 → ran 𝑔𝐷)
22 resabs1 4987 . . . . . . . . . . . . 13 (ran 𝑔𝐷 → ((inr ↾ 𝐷) ↾ ran 𝑔) = (inr ↾ ran 𝑔))
2310, 21, 223syl 17 . . . . . . . . . . . 12 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ((inr ↾ 𝐷) ↾ ran 𝑔) = (inr ↾ ran 𝑔))
2423rneqd 4906 . . . . . . . . . . 11 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ran ((inr ↾ 𝐷) ↾ ran 𝑔) = ran (inr ↾ ran 𝑔))
2520, 24eqtrid 2249 . . . . . . . . . 10 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ran ((inr ↾ 𝐷) ∘ 𝑔) = ran (inr ↾ ran 𝑔))
2619, 25ineq12d 3374 . . . . . . . . 9 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → (ran ((inl ↾ 𝐵) ∘ 𝑓) ∩ ran ((inr ↾ 𝐷) ∘ 𝑔)) = (ran (inl ↾ ran 𝑓) ∩ ran (inr ↾ ran 𝑔)))
27 djuinr 7164 . . . . . . . . 9 (ran (inl ↾ ran 𝑓) ∩ ran (inr ↾ ran 𝑔)) = ∅
2826, 27eqtrdi 2253 . . . . . . . 8 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → (ran ((inl ↾ 𝐵) ∘ 𝑓) ∩ ran ((inr ↾ 𝐷) ∘ 𝑔)) = ∅)
298, 12, 28casef1 7191 . . . . . . 7 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)):(𝐴𝐶)–1-1→(𝐵𝐷))
30 f1f 5480 . . . . . . 7 (case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)):(𝐴𝐶)–1-1→(𝐵𝐷) → case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)):(𝐴𝐶)⟶(𝐵𝐷))
3129, 30syl 14 . . . . . 6 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)):(𝐴𝐶)⟶(𝐵𝐷))
32 reldom 6831 . . . . . . . . 9 Rel ≼
3332brrelex1i 4717 . . . . . . . 8 (𝐴𝐵𝐴 ∈ V)
3433ad3antrrr 492 . . . . . . 7 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → 𝐴 ∈ V)
3532brrelex1i 4717 . . . . . . . 8 (𝐶𝐷𝐶 ∈ V)
3635ad3antlr 493 . . . . . . 7 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → 𝐶 ∈ V)
37 djuex 7144 . . . . . . 7 ((𝐴 ∈ V ∧ 𝐶 ∈ V) → (𝐴𝐶) ∈ V)
3834, 36, 37syl2anc 411 . . . . . 6 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → (𝐴𝐶) ∈ V)
39 fex 5812 . . . . . 6 ((case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)):(𝐴𝐶)⟶(𝐵𝐷) ∧ (𝐴𝐶) ∈ V) → case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)) ∈ V)
4031, 38, 39syl2anc 411 . . . . 5 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)) ∈ V)
41 f1eq1 5475 . . . . . 6 ( = case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)) → (:(𝐴𝐶)–1-1→(𝐵𝐷) ↔ case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)):(𝐴𝐶)–1-1→(𝐵𝐷)))
4241spcegv 2860 . . . . 5 (case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)) ∈ V → (case(((inl ↾ 𝐵) ∘ 𝑓), ((inr ↾ 𝐷) ∘ 𝑔)):(𝐴𝐶)–1-1→(𝐵𝐷) → ∃ :(𝐴𝐶)–1-1→(𝐵𝐷)))
4340, 29, 42sylc 62 . . . 4 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ∃ :(𝐴𝐶)–1-1→(𝐵𝐷))
4432brrelex2i 4718 . . . . . 6 (𝐴𝐵𝐵 ∈ V)
4544ad3antrrr 492 . . . . 5 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → 𝐵 ∈ V)
4632brrelex2i 4718 . . . . . 6 (𝐶𝐷𝐷 ∈ V)
4746ad3antlr 493 . . . . 5 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → 𝐷 ∈ V)
48 djuex 7144 . . . . . 6 ((𝐵 ∈ V ∧ 𝐷 ∈ V) → (𝐵𝐷) ∈ V)
49 brdomg 6836 . . . . . 6 ((𝐵𝐷) ∈ V → ((𝐴𝐶) ≼ (𝐵𝐷) ↔ ∃ :(𝐴𝐶)–1-1→(𝐵𝐷)))
5048, 49syl 14 . . . . 5 ((𝐵 ∈ V ∧ 𝐷 ∈ V) → ((𝐴𝐶) ≼ (𝐵𝐷) ↔ ∃ :(𝐴𝐶)–1-1→(𝐵𝐷)))
5145, 47, 50syl2anc 411 . . . 4 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → ((𝐴𝐶) ≼ (𝐵𝐷) ↔ ∃ :(𝐴𝐶)–1-1→(𝐵𝐷)))
5243, 51mpbird 167 . . 3 ((((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) ∧ 𝑔:𝐶1-1𝐷) → (𝐴𝐶) ≼ (𝐵𝐷))
534, 52exlimddv 1921 . 2 (((𝐴𝐵𝐶𝐷) ∧ 𝑓:𝐴1-1𝐵) → (𝐴𝐶) ≼ (𝐵𝐷))
542, 53exlimddv 1921 1 ((𝐴𝐵𝐶𝐷) → (𝐴𝐶) ≼ (𝐵𝐷))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1372  wex 1514  wcel 2175  Vcvv 2771  cin 3164  wss 3165  c0 3459   class class class wbr 4043  ran crn 4675  cres 4676  ccom 4678  wf 5266  1-1wf1 5267  cdom 6825  cdju 7138  inlcinl 7146  inrcinr 7147  casecdjucase 7184
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 615  ax-in2 616  ax-io 710  ax-5 1469  ax-7 1470  ax-gen 1471  ax-ie1 1515  ax-ie2 1516  ax-8 1526  ax-10 1527  ax-11 1528  ax-i12 1529  ax-bndl 1531  ax-4 1532  ax-17 1548  ax-i9 1552  ax-ial 1556  ax-i5r 1557  ax-13 2177  ax-14 2178  ax-ext 2186  ax-coll 4158  ax-sep 4161  ax-nul 4169  ax-pow 4217  ax-pr 4252  ax-un 4479
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1375  df-fal 1378  df-nf 1483  df-sb 1785  df-eu 2056  df-mo 2057  df-clab 2191  df-cleq 2197  df-clel 2200  df-nfc 2336  df-ne 2376  df-ral 2488  df-rex 2489  df-reu 2490  df-rab 2492  df-v 2773  df-sbc 2998  df-csb 3093  df-dif 3167  df-un 3169  df-in 3171  df-ss 3178  df-nul 3460  df-pw 3617  df-sn 3638  df-pr 3639  df-op 3641  df-uni 3850  df-iun 3928  df-br 4044  df-opab 4105  df-mpt 4106  df-tr 4142  df-id 4339  df-iord 4412  df-on 4414  df-suc 4417  df-xp 4680  df-rel 4681  df-cnv 4682  df-co 4683  df-dm 4684  df-rn 4685  df-res 4686  df-ima 4687  df-iota 5231  df-fun 5272  df-fn 5273  df-f 5274  df-f1 5275  df-fo 5276  df-f1o 5277  df-fv 5278  df-1st 6225  df-2nd 6226  df-1o 6501  df-dom 6828  df-dju 7139  df-inl 7148  df-inr 7149  df-case 7185
This theorem is referenced by:  exmidfodomrlemr  7309  exmidfodomrlemrALT  7310  sbthom  15927
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