MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  0rest Structured version   Visualization version   GIF version

Theorem 0rest 17349
Description: Value of the structure restriction when the topology input is empty. (Contributed by Mario Carneiro, 13-Aug-2015.)
Assertion
Ref Expression
0rest (∅ ↾t 𝐴) = ∅

Proof of Theorem 0rest
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 0ex 5252 . . . 4 ∅ ∈ V
2 restval 17346 . . . 4 ((∅ ∈ V ∧ 𝐴 ∈ V) → (∅ ↾t 𝐴) = ran (𝑥 ∈ ∅ ↦ (𝑥𝐴)))
31, 2mpan 690 . . 3 (𝐴 ∈ V → (∅ ↾t 𝐴) = ran (𝑥 ∈ ∅ ↦ (𝑥𝐴)))
4 mpt0 6634 . . . . 5 (𝑥 ∈ ∅ ↦ (𝑥𝐴)) = ∅
54rneqi 5886 . . . 4 ran (𝑥 ∈ ∅ ↦ (𝑥𝐴)) = ran ∅
6 rn0 5875 . . . 4 ran ∅ = ∅
75, 6eqtri 2759 . . 3 ran (𝑥 ∈ ∅ ↦ (𝑥𝐴)) = ∅
83, 7eqtrdi 2787 . 2 (𝐴 ∈ V → (∅ ↾t 𝐴) = ∅)
9 relxp 5642 . . . 4 Rel (V × V)
10 restfn 17344 . . . . . 6 t Fn (V × V)
1110fndmi 6596 . . . . 5 dom ↾t = (V × V)
1211releqi 5727 . . . 4 (Rel dom ↾t ↔ Rel (V × V))
139, 12mpbir 231 . . 3 Rel dom ↾t
1413ovprc2 7398 . 2 𝐴 ∈ V → (∅ ↾t 𝐴) = ∅)
158, 14pm2.61i 182 1 (∅ ↾t 𝐴) = ∅
Colors of variables: wff setvar class
Syntax hints:   = wceq 1541  wcel 2113  Vcvv 3440  cin 3900  c0 4285  cmpt 5179   × cxp 5622  dom cdm 5624  ran crn 5625  Rel wrel 5629  (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-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-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-1st 7933  df-2nd 7934  df-rest 17342
This theorem is referenced by:  firest  17352  topnval  17354  resstopn  23130  ussval  24203  bj-rest00  37282
  Copyright terms: Public domain W3C validator