Theorem restsspw 16699

Description: The subspace topology is a collection of subsets of the restriction set. (Contributed by Mario Carneiro, 13-Aug-2015.)

Assertion

Ref	Expression
restsspw	⊢ (𝐽 ↾t 𝐴) ⊆ 𝒫 𝐴

Proof of Theorem restsspw

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		n0i 4299	. . . . . . 7 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → ¬ (𝐽 ↾t 𝐴) = ∅)
2		restfn 16692	. . . . . . . . 9 ⊢ ↾t Fn (V × V)
3		fndm 6450	. . . . . . . . 9 ⊢ ( ↾t Fn (V × V) → dom ↾t = (V × V))
4	2, 3	ax-mp 5	. . . . . . . 8 ⊢ dom ↾t = (V × V)
5	4	ndmov 7326	. . . . . . 7 ⊢ (¬ (𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝐽 ↾t 𝐴) = ∅)
6	1, 5	nsyl2 143	. . . . . 6 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → (𝐽 ∈ V ∧ 𝐴 ∈ V))
7		elrest 16695	. . . . . 6 ⊢ ((𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴)))
8	6, 7	syl 17	. . . . 5 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴)))
9	8	ibi 269	. . . 4 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴))
10		inss2 4206	. . . . . 6 ⊢ (𝑦 ∩ 𝐴) ⊆ 𝐴
11		sseq1 3992	. . . . . 6 ⊢ (𝑥 = (𝑦 ∩ 𝐴) → (𝑥 ⊆ 𝐴 ↔ (𝑦 ∩ 𝐴) ⊆ 𝐴))
12	10, 11	mpbiri 260	. . . . 5 ⊢ (𝑥 = (𝑦 ∩ 𝐴) → 𝑥 ⊆ 𝐴)
13	12	rexlimivw 3282	. . . 4 ⊢ (∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴) → 𝑥 ⊆ 𝐴)
14	9, 13	syl 17	. . 3 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ⊆ 𝐴)
15		velpw 4547	. . 3 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴)
16	14, 15	sylibr 236	. 2 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ∈ 𝒫 𝐴)
17	16	ssriv 3971	1 ⊢ (𝐽 ↾t 𝐴) ⊆ 𝒫 𝐴

Syntax hints:   ↔ wb 208   ∧ wa 398   = wceq 1533   ∈ wcel 2110  ∃wrex 3139  Vcvv 3495   ∩ cin 3935   ⊆ wss 3936  ∅c0 4291  𝒫 cpw 4539   × cxp 5548  dom cdm 5550   Fn wfn 6345  (class class class)co 7150   ↾_t crest 16688

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-rep 5183  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rab 3147  df-v 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-f1 6355  df-fo 6356  df-f1o 6357  df-fv 6358  df-ov 7153  df-oprab 7154  df-mpo 7155  df-1st 7683  df-2nd 7684  df-rest 16690

This theorem is referenced by:  1stckgenlem  22155  prdstopn  22230  trfbas2  22445  trfil1  22488  trfil2  22489  fgtr  22492  trust  22832  zdis  23418  cnambfre  34934  dvdmsscn  42213  dvnmptconst  42218  dvnxpaek  42219  dvnmul  42220  dvnprodlem3  42225