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Theorem restid 17353
Description: The subspace topology of the base set is the original topology. (Contributed by Jeff Hankins, 9-Jul-2009.) (Revised by Mario Carneiro, 13-Aug-2015.)
Hypothesis
Ref Expression
restid.1 𝑋 = 𝐽
Assertion
Ref Expression
restid (𝐽𝑉 → (𝐽t 𝑋) = 𝐽)

Proof of Theorem restid
StepHypRef Expression
1 restid.1 . . 3 𝑋 = 𝐽
2 uniexg 7685 . . 3 (𝐽𝑉 𝐽 ∈ V)
31, 2eqeltrid 2840 . 2 (𝐽𝑉𝑋 ∈ V)
41eqimss2i 3995 . . 3 𝐽𝑋
5 sspwuni 5055 . . 3 (𝐽 ⊆ 𝒫 𝑋 𝐽𝑋)
64, 5mpbir 231 . 2 𝐽 ⊆ 𝒫 𝑋
7 restid2 17350 . 2 ((𝑋 ∈ V ∧ 𝐽 ⊆ 𝒫 𝑋) → (𝐽t 𝑋) = 𝐽)
83, 6, 7sylancl 586 1 (𝐽𝑉 → (𝐽t 𝑋) = 𝐽)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1541  wcel 2113  Vcvv 3440  wss 3901  𝒫 cpw 4554   cuni 4863  (class class class)co 7358  t crest 17340
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-rep 5224  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-reu 3351  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-ov 7361  df-oprab 7362  df-mpo 7363  df-rest 17342
This theorem is referenced by:  toponrestid  22865  restin  23110  cnrmnrm  23305  cmpkgen  23495  xkopt  23599  xkoinjcn  23631  ussid  24204  tuslem  24210  cnperf  24765  retopconn  24774  abscncfALT  24874  cnmpopc  24878  recnperf  25862  lhop1lem  25974  cxpcn3  26714  retopsconn  35443  ivthALT  36529  binomcxplemdvbinom  44590  binomcxplemnotnn0  44593  fsumcncf  46118  ioccncflimc  46125  cncfuni  46126  icocncflimc  46129  cncfiooicclem1  46133  itgsubsticclem  46215  dirkercncflem2  46344  dirkercncflem4  46346  fourierdlem32  46379  fourierdlem33  46380  fourierdlem62  46408  fourierdlem93  46439  fourierdlem101  46447
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