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Theorem suppssfv 6230
Description: Formula building theorem for support restriction, on a function which preserves zero. (Contributed by Stefan O'Rear, 9-Mar-2015.)
Hypotheses
Ref Expression
suppssfv.a (𝜑 → ((𝑥𝐷𝐴) “ (V ∖ {𝑌})) ⊆ 𝐿)
suppssfv.f (𝜑 → (𝐹𝑌) = 𝑍)
suppssfv.v ((𝜑𝑥𝐷) → 𝐴𝑉)
Assertion
Ref Expression
suppssfv (𝜑 → ((𝑥𝐷 ↦ (𝐹𝐴)) “ (V ∖ {𝑍})) ⊆ 𝐿)
Distinct variable groups:   𝜑,𝑥   𝑥,𝑌   𝑥,𝑍
Allowed substitution hints:   𝐴(𝑥)   𝐷(𝑥)   𝐹(𝑥)   𝐿(𝑥)   𝑉(𝑥)

Proof of Theorem suppssfv
StepHypRef Expression
1 eldifsni 3802 . . . . 5 ((𝐹𝐴) ∈ (V ∖ {𝑍}) → (𝐹𝐴) ≠ 𝑍)
2 suppssfv.v . . . . . . . . 9 ((𝜑𝑥𝐷) → 𝐴𝑉)
3 elex 2814 . . . . . . . . 9 (𝐴𝑉𝐴 ∈ V)
42, 3syl 14 . . . . . . . 8 ((𝜑𝑥𝐷) → 𝐴 ∈ V)
54adantr 276 . . . . . . 7 (((𝜑𝑥𝐷) ∧ (𝐹𝐴) ≠ 𝑍) → 𝐴 ∈ V)
6 suppssfv.f . . . . . . . . . . 11 (𝜑 → (𝐹𝑌) = 𝑍)
7 fveq2 5639 . . . . . . . . . . . 12 (𝐴 = 𝑌 → (𝐹𝐴) = (𝐹𝑌))
87eqeq1d 2240 . . . . . . . . . . 11 (𝐴 = 𝑌 → ((𝐹𝐴) = 𝑍 ↔ (𝐹𝑌) = 𝑍))
96, 8syl5ibrcom 157 . . . . . . . . . 10 (𝜑 → (𝐴 = 𝑌 → (𝐹𝐴) = 𝑍))
109necon3d 2446 . . . . . . . . 9 (𝜑 → ((𝐹𝐴) ≠ 𝑍𝐴𝑌))
1110adantr 276 . . . . . . . 8 ((𝜑𝑥𝐷) → ((𝐹𝐴) ≠ 𝑍𝐴𝑌))
1211imp 124 . . . . . . 7 (((𝜑𝑥𝐷) ∧ (𝐹𝐴) ≠ 𝑍) → 𝐴𝑌)
13 eldifsn 3800 . . . . . . 7 (𝐴 ∈ (V ∖ {𝑌}) ↔ (𝐴 ∈ V ∧ 𝐴𝑌))
145, 12, 13sylanbrc 417 . . . . . 6 (((𝜑𝑥𝐷) ∧ (𝐹𝐴) ≠ 𝑍) → 𝐴 ∈ (V ∖ {𝑌}))
1514ex 115 . . . . 5 ((𝜑𝑥𝐷) → ((𝐹𝐴) ≠ 𝑍𝐴 ∈ (V ∖ {𝑌})))
161, 15syl5 32 . . . 4 ((𝜑𝑥𝐷) → ((𝐹𝐴) ∈ (V ∖ {𝑍}) → 𝐴 ∈ (V ∖ {𝑌})))
1716ss2rabdv 3308 . . 3 (𝜑 → {𝑥𝐷 ∣ (𝐹𝐴) ∈ (V ∖ {𝑍})} ⊆ {𝑥𝐷𝐴 ∈ (V ∖ {𝑌})})
18 eqid 2231 . . . 4 (𝑥𝐷 ↦ (𝐹𝐴)) = (𝑥𝐷 ↦ (𝐹𝐴))
1918mptpreima 5230 . . 3 ((𝑥𝐷 ↦ (𝐹𝐴)) “ (V ∖ {𝑍})) = {𝑥𝐷 ∣ (𝐹𝐴) ∈ (V ∖ {𝑍})}
20 eqid 2231 . . . 4 (𝑥𝐷𝐴) = (𝑥𝐷𝐴)
2120mptpreima 5230 . . 3 ((𝑥𝐷𝐴) “ (V ∖ {𝑌})) = {𝑥𝐷𝐴 ∈ (V ∖ {𝑌})}
2217, 19, 213sstr4g 3270 . 2 (𝜑 → ((𝑥𝐷 ↦ (𝐹𝐴)) “ (V ∖ {𝑍})) ⊆ ((𝑥𝐷𝐴) “ (V ∖ {𝑌})))
23 suppssfv.a . 2 (𝜑 → ((𝑥𝐷𝐴) “ (V ∖ {𝑌})) ⊆ 𝐿)
2422, 23sstrd 3237 1 (𝜑 → ((𝑥𝐷 ↦ (𝐹𝐴)) “ (V ∖ {𝑍})) ⊆ 𝐿)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104   = wceq 1397  wcel 2202  wne 2402  {crab 2514  Vcvv 2802  cdif 3197  wss 3200  {csn 3669  cmpt 4150  ccnv 4724  cima 4728  cfv 5326
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-xp 4731  df-rel 4732  df-cnv 4733  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fv 5334
This theorem is referenced by: (None)
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