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Theorem restsspw 17472
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 4295 . . . . . . 7 (𝑥 ∈ (𝐽t 𝐴) → ¬ (𝐽t 𝐴) = ∅)
2 restfn 17465 . . . . . . . . 9 t Fn (V × V)
3 fndm 6628 . . . . . . . . 9 ( ↾t Fn (V × V) → dom ↾t = (V × V))
42, 3ax-mp 5 . . . . . . . 8 dom ↾t = (V × V)
54ndmov 7584 . . . . . . 7 (¬ (𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝐽t 𝐴) = ∅)
61, 5nsyl2 142 . . . . . 6 (𝑥 ∈ (𝐽t 𝐴) → (𝐽 ∈ V ∧ 𝐴 ∈ V))
7 elrest 17468 . . . . . 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 4192 . . . . . 6 (𝑦𝐴) ⊆ 𝐴
11 sseq1 3964 . . . . . 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 4563 . . 3 (𝑥 ∈ 𝒫 𝐴𝑥𝐴)
1614, 15sylibr 237 . 2 (𝑥 ∈ (𝐽t 𝐴) → 𝑥 ∈ 𝒫 𝐴)
1716ssriv 3943 1 (𝐽t 𝐴) ⊆ 𝒫 𝐴
Colors of variables: wff setvar class
Syntax hints:  wb 209  wa 400   = wceq 1563  wcel 2145  wrex 3089  Vcvv 3457  cin 3906  wss 3907  c0 4288  𝒫 cpw 4558   × cxp 5649  dom cdm 5651   Fn wfn 6520  (class class class)co 7400  t crest 17461
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-rep 5231  ax-sep 5250  ax-nul 5260  ax-pr 5394  ax-un 7722
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3080  df-rex 3090  df-reu 3371  df-rab 3418  df-v 3459  df-sbc 3748  df-csb 3856  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-iun 4953  df-br 5105  df-opab 5167  df-mpt 5186  df-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-f1 6530  df-fo 6531  df-f1o 6532  df-fv 6533  df-ov 7403  df-oprab 7404  df-mpo 7405  df-1st 7974  df-2nd 7975  df-rest 17463
This theorem is referenced by:  1stckgenlem  23667  prdstopn  23742  trfbas2  23957  trfil1  24000  trfil2  24001  fgtr  24004  trust  24343  zdis  24931  cnambfre  38174  dvdmsscn  46509  dvnmptconst  46514  dvnxpaek  46515  dvnmul  46516  dvnprodlem3  46521
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