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Theorem suppimacnv 7291
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 4648 . . . . . . . 8 (𝑡 = 𝑠 → (𝑥𝑅𝑡𝑥𝑅𝑠))
21cbvexvw 1968 . . . . . . 7 (∃𝑡 𝑥𝑅𝑡 ↔ ∃𝑠 𝑥𝑅𝑠)
3 breq2 4648 . . . . . . . . . . . . . 14 (𝑠 = 𝑍 → (𝑥𝑅𝑠𝑥𝑅𝑍))
43anbi1d 740 . . . . . . . . . . . . 13 (𝑠 = 𝑍 → ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) ↔ (𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍))))
5 bianir 1008 . . . . . . . . . . . . . . . . . 18 ((𝑡𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → 𝑥𝑅𝑡)
6 vex 3198 . . . . . . . . . . . . . . . . . . . 20 𝑡 ∈ V
7 breq2 4648 . . . . . . . . . . . . . . . . . . . . 21 (𝑦 = 𝑡 → (𝑥𝑅𝑦𝑥𝑅𝑡))
8 neeq1 2853 . . . . . . . . . . . . . . . . . . . . 21 (𝑦 = 𝑡 → (𝑦𝑍𝑡𝑍))
97, 8anbi12d 746 . . . . . . . . . . . . . . . . . . . 20 (𝑦 = 𝑡 → ((𝑥𝑅𝑦𝑦𝑍) ↔ (𝑥𝑅𝑡𝑡𝑍)))
106, 9spcev 3295 . . . . . . . . . . . . . . . . . . 19 ((𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
1110ex 450 . . . . . . . . . . . . . . . . . 18 (𝑥𝑅𝑡 → (𝑡𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
125, 11syl 17 . . . . . . . . . . . . . . . . 17 ((𝑡𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → (𝑡𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
1312ex 450 . . . . . . . . . . . . . . . 16 (𝑡𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → (𝑡𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
1413pm2.43a 54 . . . . . . . . . . . . . . 15 (𝑡𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
1514adantld 483 . . . . . . . . . . . . . 14 (𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
16 nne 2795 . . . . . . . . . . . . . . . 16 𝑡𝑍𝑡 = 𝑍)
17 notbi 309 . . . . . . . . . . . . . . . . . . . 20 ((𝑥𝑅𝑡𝑡𝑍) ↔ (¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍))
18 bianir 1008 . . . . . . . . . . . . . . . . . . . . . 22 ((¬ 𝑡𝑍 ∧ (¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍)) → ¬ 𝑥𝑅𝑡)
19 breq2 4648 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑍 = 𝑡 → (𝑥𝑅𝑍𝑥𝑅𝑡))
2019eqcoms 2628 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑡 = 𝑍 → (𝑥𝑅𝑍𝑥𝑅𝑡))
21 pm2.24 121 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑥𝑅𝑡 → (¬ 𝑥𝑅𝑡 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
2220, 21syl6bi 243 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑡 = 𝑍 → (𝑥𝑅𝑍 → (¬ 𝑥𝑅𝑡 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2322com13 88 . . . . . . . . . . . . . . . . . . . . . 22 𝑥𝑅𝑡 → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2418, 23syl 17 . . . . . . . . . . . . . . . . . . . . 21 ((¬ 𝑡𝑍 ∧ (¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍)) → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2524ex 450 . . . . . . . . . . . . . . . . . . . 20 𝑡𝑍 → ((¬ 𝑥𝑅𝑡 ↔ ¬ 𝑡𝑍) → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))))
2617, 25syl5bi 232 . . . . . . . . . . . . . . . . . . 19 𝑡𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → (𝑥𝑅𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))))
2726com13 88 . . . . . . . . . . . . . . . . . 18 (𝑥𝑅𝑍 → ((𝑥𝑅𝑡𝑡𝑍) → (¬ 𝑡𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))))
2827imp 445 . . . . . . . . . . . . . . . . 17 ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → (¬ 𝑡𝑍 → (𝑡 = 𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
2928com13 88 . . . . . . . . . . . . . . . 16 (𝑡 = 𝑍 → (¬ 𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
3016, 29sylbi 207 . . . . . . . . . . . . . . 15 𝑡𝑍 → (¬ 𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))))
3130pm2.43i 52 . . . . . . . . . . . . . 14 𝑡𝑍 → ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
3215, 31pm2.61i 176 . . . . . . . . . . . . 13 ((𝑥𝑅𝑍 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
334, 32syl6bi 243 . . . . . . . . . . . 12 (𝑠 = 𝑍 → ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
34 vex 3198 . . . . . . . . . . . . . . . 16 𝑠 ∈ V
35 breq2 4648 . . . . . . . . . . . . . . . . 17 (𝑦 = 𝑠 → (𝑥𝑅𝑦𝑥𝑅𝑠))
36 neeq1 2853 . . . . . . . . . . . . . . . . 17 (𝑦 = 𝑠 → (𝑦𝑍𝑠𝑍))
3735, 36anbi12d 746 . . . . . . . . . . . . . . . 16 (𝑦 = 𝑠 → ((𝑥𝑅𝑦𝑦𝑍) ↔ (𝑥𝑅𝑠𝑠𝑍)))
3834, 37spcev 3295 . . . . . . . . . . . . . . 15 ((𝑥𝑅𝑠𝑠𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
3938ex 450 . . . . . . . . . . . . . 14 (𝑥𝑅𝑠 → (𝑠𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4039adantr 481 . . . . . . . . . . . . 13 ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → (𝑠𝑍 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4140com12 32 . . . . . . . . . . . 12 (𝑠𝑍 → ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4233, 41pm2.61ine 2874 . . . . . . . . . . 11 ((𝑥𝑅𝑠 ∧ (𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
4342expcom 451 . . . . . . . . . 10 ((𝑥𝑅𝑡𝑡𝑍) → (𝑥𝑅𝑠 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4443exlimiv 1856 . . . . . . . . 9 (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → (𝑥𝑅𝑠 → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4544com12 32 . . . . . . . 8 (𝑥𝑅𝑠 → (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4645exlimiv 1856 . . . . . . 7 (∃𝑠 𝑥𝑅𝑠 → (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
472, 46sylbi 207 . . . . . 6 (∃𝑡 𝑥𝑅𝑡 → (∃𝑡(𝑥𝑅𝑡𝑡𝑍) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
4847imp 445 . . . . 5 ((∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍))
4948a1i 11 . . . 4 ((𝑅𝑉𝑍𝑊) → ((∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍)) → ∃𝑦(𝑥𝑅𝑦𝑦𝑍)))
5049ss2abdv 3667 . . 3 ((𝑅𝑉𝑍𝑊) → {𝑥 ∣ (∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍))} ⊆ {𝑥 ∣ ∃𝑦(𝑥𝑅𝑦𝑦𝑍)})
51 suppvalbr 7284 . . 3 ((𝑅𝑉𝑍𝑊) → (𝑅 supp 𝑍) = {𝑥 ∣ (∃𝑡 𝑥𝑅𝑡 ∧ ∃𝑡(𝑥𝑅𝑡𝑡𝑍))})
52 cnvimadfsn 7289 . . . 4 (𝑅 “ (V ∖ {𝑍})) = {𝑥 ∣ ∃𝑦(𝑥𝑅𝑦𝑦𝑍)}
5352a1i 11 . . 3 ((𝑅𝑉𝑍𝑊) → (𝑅 “ (V ∖ {𝑍})) = {𝑥 ∣ ∃𝑦(𝑥𝑅𝑦𝑦𝑍)})
5450, 51, 533sstr4d 3640 . 2 ((𝑅𝑉𝑍𝑊) → (𝑅 supp 𝑍) ⊆ (𝑅 “ (V ∖ {𝑍})))
55 suppimacnvss 7290 . 2 ((𝑅𝑉𝑍𝑊) → (𝑅 “ (V ∖ {𝑍})) ⊆ (𝑅 supp 𝑍))
5654, 55eqssd 3612 1 ((𝑅𝑉𝑍𝑊) → (𝑅 supp 𝑍) = (𝑅 “ (V ∖ {𝑍})))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 384   = wceq 1481  wex 1702  wcel 1988  {cab 2606  wne 2791  Vcvv 3195  cdif 3564  {csn 4168   class class class wbr 4644  ccnv 5103  cima 5107  (class class class)co 6635   supp csupp 7280
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1720  ax-4 1735  ax-5 1837  ax-6 1886  ax-7 1933  ax-8 1990  ax-9 1997  ax-10 2017  ax-11 2032  ax-12 2045  ax-13 2244  ax-ext 2600  ax-sep 4772  ax-nul 4780  ax-pr 4897  ax-un 6934
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1484  df-ex 1703  df-nf 1708  df-sb 1879  df-eu 2472  df-mo 2473  df-clab 2607  df-cleq 2613  df-clel 2616  df-nfc 2751  df-ne 2792  df-ral 2914  df-rex 2915  df-rab 2918  df-v 3197  df-sbc 3430  df-dif 3570  df-un 3572  df-in 3574  df-ss 3581  df-nul 3908  df-if 4078  df-sn 4169  df-pr 4171  df-op 4175  df-uni 4428  df-br 4645  df-opab 4704  df-id 5014  df-xp 5110  df-rel 5111  df-cnv 5112  df-co 5113  df-dm 5114  df-rn 5115  df-res 5116  df-ima 5117  df-iota 5839  df-fun 5878  df-fv 5884  df-ov 6638  df-oprab 6639  df-mpt2 6640  df-supp 7281
This theorem is referenced by:  frnsuppeq  7292  suppun  7300  mptsuppdifd  7302  supp0cosupp0  7319  imacosupp  7320  fdmfisuppfi  8269  fsuppun  8279  fsuppco  8292  gsumval3a  18285  gsumzf1o  18294  gsumzaddlem  18302  gsumzmhm  18318  gsumzoppg  18325  deg1val  23837  suppss3  29476  ffsrn  29478  fpwrelmapffslem  29481  sitgclg  30378  eulerpartlemmf  30411  eulerpartlemgf  30415  fidmfisupp  39206
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