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Theorem sbthlemi9 6846
 Description: Lemma for isbth 6848. (Contributed by NM, 28-Mar-1998.)
Hypotheses
Ref Expression
sbthlem.1 𝐴 ∈ V
sbthlem.2 𝐷 = {𝑥 ∣ (𝑥𝐴 ∧ (𝑔 “ (𝐵 ∖ (𝑓𝑥))) ⊆ (𝐴𝑥))}
sbthlem.3 𝐻 = ((𝑓 𝐷) ∪ (𝑔 ↾ (𝐴 𝐷)))
Assertion
Ref Expression
sbthlemi9 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝐻:𝐴1-1-onto𝐵)
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐷   𝑥,𝑓   𝑥,𝑔   𝑥,𝐻
Allowed substitution hints:   𝐴(𝑓,𝑔)   𝐵(𝑓,𝑔)   𝐷(𝑓,𝑔)   𝐻(𝑓,𝑔)

Proof of Theorem sbthlemi9
StepHypRef Expression
1 simp2 982 . . . . . . . . . 10 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝑓:𝐴1-1𝐵)
2 df-f1 5123 . . . . . . . . . 10 (𝑓:𝐴1-1𝐵 ↔ (𝑓:𝐴𝐵 ∧ Fun 𝑓))
31, 2sylib 121 . . . . . . . . 9 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → (𝑓:𝐴𝐵 ∧ Fun 𝑓))
43simpld 111 . . . . . . . 8 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝑓:𝐴𝐵)
5 df-f 5122 . . . . . . . 8 (𝑓:𝐴𝐵 ↔ (𝑓 Fn 𝐴 ∧ ran 𝑓𝐵))
64, 5sylib 121 . . . . . . 7 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → (𝑓 Fn 𝐴 ∧ ran 𝑓𝐵))
76simpld 111 . . . . . 6 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝑓 Fn 𝐴)
8 df-fn 5121 . . . . . 6 (𝑓 Fn 𝐴 ↔ (Fun 𝑓 ∧ dom 𝑓 = 𝐴))
97, 8sylib 121 . . . . 5 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → (Fun 𝑓 ∧ dom 𝑓 = 𝐴))
109simpld 111 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → Fun 𝑓)
11 simp3 983 . . . . . 6 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝑔:𝐵1-1𝐴)
12 df-f1 5123 . . . . . 6 (𝑔:𝐵1-1𝐴 ↔ (𝑔:𝐵𝐴 ∧ Fun 𝑔))
1311, 12sylib 121 . . . . 5 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → (𝑔:𝐵𝐴 ∧ Fun 𝑔))
1413simprd 113 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → Fun 𝑔)
15 sbthlem.1 . . . . 5 𝐴 ∈ V
16 sbthlem.2 . . . . 5 𝐷 = {𝑥 ∣ (𝑥𝐴 ∧ (𝑔 “ (𝐵 ∖ (𝑓𝑥))) ⊆ (𝐴𝑥))}
17 sbthlem.3 . . . . 5 𝐻 = ((𝑓 𝐷) ∪ (𝑔 ↾ (𝐴 𝐷)))
1815, 16, 17sbthlem7 6844 . . . 4 ((Fun 𝑓 ∧ Fun 𝑔) → Fun 𝐻)
1910, 14, 18syl2anc 408 . . 3 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → Fun 𝐻)
20 simp1 981 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → EXMID)
219simprd 113 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → dom 𝑓 = 𝐴)
2213simpld 111 . . . . . 6 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝑔:𝐵𝐴)
23 df-f 5122 . . . . . 6 (𝑔:𝐵𝐴 ↔ (𝑔 Fn 𝐵 ∧ ran 𝑔𝐴))
2422, 23sylib 121 . . . . 5 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → (𝑔 Fn 𝐵 ∧ ran 𝑔𝐴))
2524simprd 113 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → ran 𝑔𝐴)
2615, 16, 17sbthlemi5 6842 . . . 4 ((EXMID ∧ (dom 𝑓 = 𝐴 ∧ ran 𝑔𝐴)) → dom 𝐻 = 𝐴)
2720, 21, 25, 26syl12anc 1214 . . 3 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → dom 𝐻 = 𝐴)
28 df-fn 5121 . . 3 (𝐻 Fn 𝐴 ↔ (Fun 𝐻 ∧ dom 𝐻 = 𝐴))
2919, 27, 28sylanbrc 413 . 2 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝐻 Fn 𝐴)
303simprd 113 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → Fun 𝑓)
3124simpld 111 . . . . . 6 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝑔 Fn 𝐵)
32 df-fn 5121 . . . . . 6 (𝑔 Fn 𝐵 ↔ (Fun 𝑔 ∧ dom 𝑔 = 𝐵))
3331, 32sylib 121 . . . . 5 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → (Fun 𝑔 ∧ dom 𝑔 = 𝐵))
3433, 25jca 304 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → ((Fun 𝑔 ∧ dom 𝑔 = 𝐵) ∧ ran 𝑔𝐴))
3515, 16, 17sbthlemi8 6845 . . . 4 (((EXMID ∧ Fun 𝑓) ∧ (((Fun 𝑔 ∧ dom 𝑔 = 𝐵) ∧ ran 𝑔𝐴) ∧ Fun 𝑔)) → Fun 𝐻)
3620, 30, 34, 14, 35syl22anc 1217 . . 3 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → Fun 𝐻)
376simprd 113 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → ran 𝑓𝐵)
3833simprd 113 . . . . 5 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → dom 𝑔 = 𝐵)
3938, 25jca 304 . . . 4 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → (dom 𝑔 = 𝐵 ∧ ran 𝑔𝐴))
40 df-rn 4545 . . . . 5 ran 𝐻 = dom 𝐻
4115, 16, 17sbthlemi6 6843 . . . . 5 (((EXMID ∧ ran 𝑓𝐵) ∧ ((dom 𝑔 = 𝐵 ∧ ran 𝑔𝐴) ∧ Fun 𝑔)) → ran 𝐻 = 𝐵)
4240, 41syl5eqr 2184 . . . 4 (((EXMID ∧ ran 𝑓𝐵) ∧ ((dom 𝑔 = 𝐵 ∧ ran 𝑔𝐴) ∧ Fun 𝑔)) → dom 𝐻 = 𝐵)
4320, 37, 39, 14, 42syl22anc 1217 . . 3 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → dom 𝐻 = 𝐵)
44 df-fn 5121 . . 3 (𝐻 Fn 𝐵 ↔ (Fun 𝐻 ∧ dom 𝐻 = 𝐵))
4536, 43, 44sylanbrc 413 . 2 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝐻 Fn 𝐵)
46 dff1o4 5368 . 2 (𝐻:𝐴1-1-onto𝐵 ↔ (𝐻 Fn 𝐴𝐻 Fn 𝐵))
4729, 45, 46sylanbrc 413 1 ((EXMID𝑓:𝐴1-1𝐵𝑔:𝐵1-1𝐴) → 𝐻:𝐴1-1-onto𝐵)
 Colors of variables: wff set class Syntax hints:   → wi 4   ∧ wa 103   ∧ w3a 962   = wceq 1331   ∈ wcel 1480  {cab 2123  Vcvv 2681   ∖ cdif 3063   ∪ cun 3064   ⊆ wss 3066  ∪ cuni 3731  EXMIDwem 4113  ◡ccnv 4533  dom cdm 4534  ran crn 4535   ↾ cres 4536   “ cima 4537  Fun wfun 5112   Fn wfn 5113  ⟶wf 5114  –1-1→wf1 5115  –1-1-onto→wf1o 5117 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 603  ax-in2 604  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-nul 4049  ax-pow 4093  ax-pr 4126 This theorem depends on definitions:  df-bi 116  df-stab 816  df-dc 820  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2000  df-mo 2001  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-rab 2423  df-v 2683  df-dif 3068  df-un 3070  df-in 3072  df-ss 3079  df-nul 3359  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-uni 3732  df-br 3925  df-opab 3985  df-exmid 4114  df-id 4210  df-xp 4540  df-rel 4541  df-cnv 4542  df-co 4543  df-dm 4544  df-rn 4545  df-res 4546  df-ima 4547  df-fun 5120  df-fn 5121  df-f 5122  df-f1 5123  df-fo 5124  df-f1o 5125 This theorem is referenced by:  sbthlemi10  6847
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