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Theorem suppssfv 6153
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 3761 . . . . 5 ((𝐹𝐴) ∈ (V ∖ {𝑍}) → (𝐹𝐴) ≠ 𝑍)
2 suppssfv.v . . . . . . . . 9 ((𝜑𝑥𝐷) → 𝐴𝑉)
3 elex 2782 . . . . . . . . 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 5575 . . . . . . . . . . . 12 (𝐴 = 𝑌 → (𝐹𝐴) = (𝐹𝑌))
87eqeq1d 2213 . . . . . . . . . . 11 (𝐴 = 𝑌 → ((𝐹𝐴) = 𝑍 ↔ (𝐹𝑌) = 𝑍))
96, 8syl5ibrcom 157 . . . . . . . . . 10 (𝜑 → (𝐴 = 𝑌 → (𝐹𝐴) = 𝑍))
109necon3d 2419 . . . . . . . . 9 (𝜑 → ((𝐹𝐴) ≠ 𝑍𝐴𝑌))
1110adantr 276 . . . . . . . 8 ((𝜑𝑥𝐷) → ((𝐹𝐴) ≠ 𝑍𝐴𝑌))
1211imp 124 . . . . . . 7 (((𝜑𝑥𝐷) ∧ (𝐹𝐴) ≠ 𝑍) → 𝐴𝑌)
13 eldifsn 3759 . . . . . . 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 3273 . . 3 (𝜑 → {𝑥𝐷 ∣ (𝐹𝐴) ∈ (V ∖ {𝑍})} ⊆ {𝑥𝐷𝐴 ∈ (V ∖ {𝑌})})
18 eqid 2204 . . . 4 (𝑥𝐷 ↦ (𝐹𝐴)) = (𝑥𝐷 ↦ (𝐹𝐴))
1918mptpreima 5175 . . 3 ((𝑥𝐷 ↦ (𝐹𝐴)) “ (V ∖ {𝑍})) = {𝑥𝐷 ∣ (𝐹𝐴) ∈ (V ∖ {𝑍})}
20 eqid 2204 . . . 4 (𝑥𝐷𝐴) = (𝑥𝐷𝐴)
2120mptpreima 5175 . . 3 ((𝑥𝐷𝐴) “ (V ∖ {𝑌})) = {𝑥𝐷𝐴 ∈ (V ∖ {𝑌})}
2217, 19, 213sstr4g 3235 . 2 (𝜑 → ((𝑥𝐷 ↦ (𝐹𝐴)) “ (V ∖ {𝑍})) ⊆ ((𝑥𝐷𝐴) “ (V ∖ {𝑌})))
23 suppssfv.a . 2 (𝜑 → ((𝑥𝐷𝐴) “ (V ∖ {𝑌})) ⊆ 𝐿)
2422, 23sstrd 3202 1 (𝜑 → ((𝑥𝐷 ↦ (𝐹𝐴)) “ (V ∖ {𝑍})) ⊆ 𝐿)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104   = wceq 1372  wcel 2175  wne 2375  {crab 2487  Vcvv 2771  cdif 3162  wss 3165  {csn 3632  cmpt 4104  ccnv 4673  cima 4677  cfv 5270
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-14 2178  ax-ext 2186  ax-sep 4161  ax-pow 4217  ax-pr 4252
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1375  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-rab 2492  df-v 2773  df-dif 3167  df-un 3169  df-in 3171  df-ss 3178  df-pw 3617  df-sn 3638  df-pr 3639  df-op 3641  df-uni 3850  df-br 4044  df-opab 4105  df-mpt 4106  df-xp 4680  df-rel 4681  df-cnv 4682  df-dm 4684  df-rn 4685  df-res 4686  df-ima 4687  df-iota 5231  df-fv 5278
This theorem is referenced by: (None)
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