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

Theorem restfn 17601
Description: The subspace topology operator is a function on pairs. (Contributed by Mario Carneiro, 1-May-2015.)
Assertion
Ref Expression
restfn ↾t Fn (V × V)

Proof of Theorem restfn
Dummy variables 𝑥 𝑗 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-rest 17599 . 2 ↾t = (𝑗 ∈ V, 𝑥 ∈ V ↦ ran (𝑦 ∈ 𝑗 ↦ (𝑦 ∩ 𝑥)))
2 vex 3454 . . . 4 𝑗 ∈ V
32mptex 7230 . . 3 (𝑦 ∈ 𝑗 ↦ (𝑦 ∩ 𝑥)) ∈ V
43rnex 7923 . 2 ran (𝑦 ∈ 𝑗 ↦ (𝑦 ∩ 𝑥)) ∈ V
51, 4fnmpoi 8082 1 ↾t Fn (V × V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  Vcvv 3450   ∩ cin 4089   ↦ cmpt 5185   × cxp 5648  ran crn 5651   Fn wfn 6534   ↾t crest 17597
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-rep 5231  ax-sep 5248  ax-nul 5259  ax-pr 5390  ax-un 7752
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-reu 3366  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3847  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-iun 4952  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-res 5662  df-ima 5663  df-iota 6494  df-fun 6541  df-fn 6542  df-f 6543  df-f1 6544  df-fo 6545  df-f1o 6546  df-fv 6547  df-oprab 7425  df-mpo 7426  df-1st 8002  df-2nd 8003  df-rest 17599
This theorem is used by:  0rest  17606  restsspw  17608  firest  17609  restrcl  23481  restbas  23482  ssrest  23500  resstopn  23510
  Copyright terms: Public domain W3C validator