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Theorem restsspw 17485
Description: The subspace topology is a collection of subsets of the restriction set. (Contributed by Mario Carneiro, 13-Aug-2015.)
Assertion
Ref Expression
restsspw (𝐽t 𝐴) ⊆ 𝒫 𝐴

Proof of Theorem restsspw
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 n0i 4294 . . . . . . 7 (𝑥 ∈ (𝐽t 𝐴) → ¬ (𝐽t 𝐴) = ∅)
2 restfn 17478 . . . . . . . . 9 t Fn (V × V)
3 fndm 6640 . . . . . . . . 9 ( ↾t Fn (V × V) → dom ↾t = (V × V))
42, 3ax-mp 5 . . . . . . . 8 dom ↾t = (V × V)
54ndmov 7596 . . . . . . 7 (¬ (𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝐽t 𝐴) = ∅)
61, 5nsyl2 142 . . . . . 6 (𝑥 ∈ (𝐽t 𝐴) → (𝐽 ∈ V ∧ 𝐴 ∈ V))
7 elrest 17481 . . . . . 6 ((𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝑥 ∈ (𝐽t 𝐴) ↔ ∃𝑦𝐽 𝑥 = (𝑦𝐴)))
86, 7syl 18 . . . . 5 (𝑥 ∈ (𝐽t 𝐴) → (𝑥 ∈ (𝐽t 𝐴) ↔ ∃𝑦𝐽 𝑥 = (𝑦𝐴)))
98ibi 270 . . . 4 (𝑥 ∈ (𝐽t 𝐴) → ∃𝑦𝐽 𝑥 = (𝑦𝐴))
10 inss2 4191 . . . . . 6 (𝑦𝐴) ⊆ 𝐴
11 sseq1 3963 . . . . . 6 (𝑥 = (𝑦𝐴) → (𝑥𝐴 ↔ (𝑦𝐴) ⊆ 𝐴))
1210, 11mpbiri 261 . . . . 5 (𝑥 = (𝑦𝐴) → 𝑥𝐴)
1312rexlimivw 3162 . . . 4 (∃𝑦𝐽 𝑥 = (𝑦𝐴) → 𝑥𝐴)
149, 13syl 18 . . 3 (𝑥 ∈ (𝐽t 𝐴) → 𝑥𝐴)
15 velpw 4568 . . 3 (𝑥 ∈ 𝒫 𝐴𝑥𝐴)
1614, 15sylibr 237 . 2 (𝑥 ∈ (𝐽t 𝐴) → 𝑥 ∈ 𝒫 𝐴)
1716ssriv 3942 1 (𝐽t 𝐴) ⊆ 𝒫 𝐴
Colors of variables: wff setvar class
Syntax hints:  wb 209  wa 400   = wceq 1570  wcel 2143  wrex 3089  Vcvv 3455  cin 3905  wss 3906  c0 4287  𝒫 cpw 4563   × cxp 5661  dom cdm 5663   Fn wfn 6533  (class class class)co 7412  t crest 17474
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-rep 5239  ax-sep 5258  ax-nul 5270  ax-pr 5406  ax-un 7734
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  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 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-ov 7415  df-oprab 7416  df-mpo 7417  df-1st 7987  df-2nd 7988  df-rest 17476
This theorem is referenced by:  1stckgenlem  23691  prdstopn  23766  trfbas2  23981  trfil1  24024  trfil2  24025  fgtr  24028  trust  24367  zdis  24955  cnambfre  38300  dvdmsscn  46633  dvnmptconst  46638  dvnxpaek  46639  dvnmul  46640  dvnprodlem3  46645
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