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Theorem suppimacnv 8176
Description: Support sets of functions expressed by inverse images. (Contributed by AV, 31-Mar-2019.) (Revised by AV, 7-Apr-2019.)
Assertion
Ref Expression
suppimacnv ((𝑅𝑉𝑍𝑊) → (𝑅 supp 𝑍) = (𝑅 “ (V ∖ {𝑍})))

Proof of Theorem suppimacnv
Dummy variables 𝑥 𝑦 𝑠 𝑡 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 breq2 5115 . . . . . . . 8 (𝑡 = 𝑠 → (𝑥𝑅𝑡𝑥𝑅𝑠))
21cbvexvw 2070 . . . . . . 7 (∃𝑡 𝑥𝑅𝑡 ↔ ∃𝑠 𝑥𝑅𝑠)
3 breq2 5115 . . . . . . . . . . . . . 14 (𝑠 = 𝑍 → (𝑥𝑅𝑠𝑥𝑅𝑍))
43anbi1d 643 . . . . . . . . . . . . 13 (𝑠 = 𝑍 → ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) ↔ (𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍))))
5 bianir 1074 . . . . . . . . . . . . . . . . . 18 ((𝑡𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → 𝑥𝑅𝑡)
6 vex 3461 . . . . . . . . . . . . . . . . . . . 20 𝑡 ∈ V
7 breq2 5115 . . . . . . . . . . . . . . . . . . . . 21 (𝑦 = 𝑡 → (𝑥𝑅𝑦𝑥𝑅𝑡))
8 neeq1 3022 . . . . . . . . . . . . . . . . . . . . 21 (𝑦 = 𝑡 → (𝑦𝑍𝑡𝑍))
97, 8anbi12d 644 . . . . . . . . . . . . . . . . . . . 20 (𝑦 = 𝑡 → ((𝑥𝑅𝑦𝑦𝑍) ↔ (𝑥𝑅𝑡𝑡𝑍)))
106, 9spcev 3567 . . . . . . . . . . . . . . . . . . 19 ((𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
1110ex 418 . . . . . . . . . . . . . . . . . 18 (𝑥𝑅𝑡 → (𝑡𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
125, 11syl 18 . . . . . . . . . . . . . . . . 17 ((𝑡𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → (𝑡𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
1312ex 418 . . . . . . . . . . . . . . . 16 (𝑡𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → (𝑡𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
1413pm2.43a 55 . . . . . . . . . . . . . . 15 (𝑡𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
1514adantld 496 . . . . . . . . . . . . . 14 (𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
16 nne 2964 . . . . . . . . . . . . . . . 16 𝑡𝑍𝑡 = 𝑍)
17 notbi 322 . . . . . . . . . . . . . . . . . . . 20 ((𝑥𝑅𝑡𝑡𝑍) ↔ (¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍))
18 bianir 1074 . . . . . . . . . . . . . . . . . . . . . 22 ((¬ 𝑡𝑍 ∧ (¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍)) → ¬ 𝑥𝑅𝑡)
19 breq2 5115 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑍 = 𝑡 → (𝑥𝑅𝑍𝑥𝑅𝑡))
2019eqcoms 2773 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑡 = 𝑍 → (𝑥𝑅𝑍𝑥𝑅𝑡))
21 pm2.24 125 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑥𝑅𝑡 → (¬ 𝑥𝑅𝑡 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
2220, 21biimtrdi 256 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑡 = 𝑍 → (𝑥𝑅𝑍 → (¬ 𝑥𝑅𝑡 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2322com13 89 . . . . . . . . . . . . . . . . . . . . . 22 𝑥𝑅𝑡 → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2418, 23syl 18 . . . . . . . . . . . . . . . . . . . . 21 ((¬ 𝑡𝑍 ∧ (¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍)) → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2524ex 418 . . . . . . . . . . . . . . . . . . . 20 𝑡𝑍 → ((¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍) → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))))
2617, 25biimtrid 245 . . . . . . . . . . . . . . . . . . 19 𝑡𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))))
2726com13 89 . . . . . . . . . . . . . . . . . 18 (𝑥𝑅𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → (¬ 𝑡𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))))
2827imp 412 . . . . . . . . . . . . . . . . 17 ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → (¬ 𝑡𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2928com13 89 . . . . . . . . . . . . . . . 16 (𝑡 = 𝑍 → (¬ 𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
3016, 29sylbi 220 . . . . . . . . . . . . . . 15 𝑡𝑍 → (¬ 𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
3130pm2.43i 53 . . . . . . . . . . . . . 14 𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
3215, 31pm2.61i 184 . . . . . . . . . . . . 13 ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
334, 32biimtrdi 256 . . . . . . . . . . . 12 (𝑠 = 𝑍 → ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
34 vex 3461 . . . . . . . . . . . . . . . 16 𝑠 ∈ V
35 breq2 5115 . . . . . . . . . . . . . . . . 17 (𝑦 = 𝑠 → (𝑥𝑅𝑦𝑥𝑅𝑠))
36 neeq1 3022 . . . . . . . . . . . . . . . . 17 (𝑦 = 𝑠 → (𝑦𝑍𝑠𝑍))
3735, 36anbi12d 644 . . . . . . . . . . . . . . . 16 (𝑦 = 𝑠 → ((𝑥𝑅𝑦𝑦𝑍) ↔ (𝑥𝑅𝑠𝑠𝑍)))
3834, 37spcev 3567 . . . . . . . . . . . . . . 15 ((𝑥𝑅𝑠𝑠𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
3938ex 418 . . . . . . . . . . . . . 14 (𝑥𝑅𝑠 → (𝑠𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4039adantr 486 . . . . . . . . . . . . 13 ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → (𝑠𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4140com12 33 . . . . . . . . . . . 12 (𝑠𝑍 → ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4233, 41pm2.61ine 3043 . . . . . . . . . . 11 ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
4342expcom 419 . . . . . . . . . 10 ((𝑥𝑅𝑡𝑡𝑍) → (𝑥𝑅𝑠 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4443exlimiv 1963 . . . . . . . . 9 (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → (𝑥𝑅𝑠 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4544com12 33 . . . . . . . 8 (𝑥𝑅𝑠 → (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4645exlimiv 1963 . . . . . . 7 (∃𝑠 𝑥𝑅𝑠 → (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
472, 46sylbi 220 . . . . . 6 (∃𝑡 𝑥𝑅𝑡 → (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4847imp 412 . . . . 5 ((∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
4948a1i 11 . . . 4 ((𝑅𝑉𝑍𝑊) → ((∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
5049ss2abdv 4020 . . 3 ((𝑅𝑉𝑍𝑊) → {𝑥 ∣ (∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍))} ⊆ {𝑥 ∣ ∃𝑦(𝑥𝑅𝑦𝑦𝑍)})
51 suppvalbr 8166 . . 3 ((𝑅𝑉𝑍𝑊) → (𝑅 supp 𝑍) = {𝑥 ∣ (∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍))})
52 cnvimadfsn 8174 . . . 4 (𝑅 “ (V ∖ {𝑍})) = {𝑥 ∣ ∃𝑦(𝑥𝑅𝑦𝑦𝑍)}
5352a1i 11 . . 3 ((𝑅𝑉𝑍𝑊) → (𝑅 “ (V ∖ {𝑍})) = {𝑥 ∣ ∃𝑦(𝑥𝑅𝑦𝑦𝑍)})
5450, 51, 533sstr4d 3993 . 2 ((𝑅𝑉𝑍𝑊) → (𝑅 supp 𝑍) ⊆ (𝑅 “ (V ∖ {𝑍})))
55 suppimacnvss 8175 . 2 ((𝑅𝑉𝑍𝑊) → (𝑅 “ (V ∖ {𝑍})) ⊆ (𝑅 supp 𝑍))
5654, 55eqssd 3955 1 ((𝑅𝑉𝑍𝑊) → (𝑅 supp 𝑍) = (𝑅 “ (V ∖ {𝑍})))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3  wi 4  wb 209  wa 401   = wceq 1570  wex 1812  wcel 2146  {cab 2743  wne 2960  Vcvv 3457  cdif 3903  {csn 4591   class class class wbr 5111  ccnv 5662  cima 5666  (class class class)co 7419   supp csupp 8162
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2737  ax-sep 5259  ax-pr 5406  ax-un 7742
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3082  df-rex 3092  df-rab 3419  df-v 3459  df-sbc 3747  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4287  df-if 4490  df-pw 4566  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4875  df-br 5112  df-opab 5176  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-iota 6496  df-fun 6542  df-fv 6548  df-ov 7422  df-oprab 7423  df-mpo 7424  df-supp 8163
This theorem is used by:  fsuppeq  8177  fsuppeqg  8178  suppun  8186  mptsuppdifd  8188  suppco  8208  fidmfisupp  9339  fdmfisuppfi  9341  fsuppun  9354  fsuppco  9369  gsumval3a  20021  gsumzf1o  20030  gsumzaddlem  20039  gsumzmhm  20055  gsumzoppg  20062  deg1val  26308  suppun2  33104  suppss3  33142  ffsrn  33147  fpwrelmapffslem  33151  sitgclg  34801  eulerpartlemmf  34834  eulerpartlemgf  34838
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