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Theorem restid 16706
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 7465 . . 3 (𝐽𝑉 𝐽 ∈ V)
31, 2eqeltrid 2917 . 2 (𝐽𝑉𝑋 ∈ V)
41eqimss2i 4025 . . 3 𝐽𝑋
5 sspwuni 5021 . . 3 (𝐽 ⊆ 𝒫 𝑋 𝐽𝑋)
64, 5mpbir 233 . 2 𝐽 ⊆ 𝒫 𝑋
7 restid2 16703 . 2 ((𝑋 ∈ V ∧ 𝐽 ⊆ 𝒫 𝑋) → (𝐽t 𝑋) = 𝐽)
83, 6, 7sylancl 588 1 (𝐽𝑉 → (𝐽t 𝑋) = 𝐽)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1533  wcel 2110  Vcvv 3494  wss 3935  𝒫 cpw 4538   cuni 4837  (class class class)co 7155  t crest 16693
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 2157  ax-12 2173  ax-ext 2793  ax-rep 5189  ax-sep 5202  ax-nul 5209  ax-pow 5265  ax-pr 5329  ax-un 7460
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 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4838  df-iun 4920  df-br 5066  df-opab 5128  df-mpt 5146  df-id 5459  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-iota 6313  df-fun 6356  df-fn 6357  df-f 6358  df-f1 6359  df-fo 6360  df-f1o 6361  df-fv 6362  df-ov 7158  df-oprab 7159  df-mpo 7160  df-rest 16695
This theorem is referenced by:  toponrestid  21528  restin  21773  cnrmnrm  21968  cmpkgen  22158  xkopt  22262  xkoinjcn  22294  ussid  22868  tuslem  22875  cnperf  23427  retopconn  23436  abscncfALT  23527  cnmpopc  23531  recnperf  24502  lhop1lem  24609  cxpcn3  25328  retopsconn  32496  ivthALT  33683  binomcxplemdvbinom  40683  binomcxplemnotnn0  40686  fsumcncf  42159  ioccncflimc  42166  cncfuni  42167  icocncflimc  42170  cncfiooicclem1  42174  itgsubsticclem  42258  dirkercncflem2  42388  dirkercncflem4  42390  fourierdlem32  42423  fourierdlem33  42424  fourierdlem62  42452  fourierdlem93  42483  fourierdlem101  42491
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