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Theorem topnvalg 12922
Description: Value of the topology extractor function. (Contributed by Mario Carneiro, 13-Aug-2015.) (Revised by Jim Kingdon, 11-Feb-2023.)
Hypotheses
Ref Expression
topnval.1 𝐵 = (Base‘𝑊)
topnval.2 𝐽 = (TopSet‘𝑊)
Assertion
Ref Expression
topnvalg (𝑊𝑉 → (𝐽t 𝐵) = (TopOpen‘𝑊))

Proof of Theorem topnvalg
Dummy variable 𝑤 is distinct from all other variables.
StepHypRef Expression
1 elex 2774 . . 3 (𝑊𝑉𝑊 ∈ V)
2 restfn 12914 . . . 4 t Fn (V × V)
3 topnval.2 . . . . 5 𝐽 = (TopSet‘𝑊)
4 tsetslid 12865 . . . . . 6 (TopSet = Slot (TopSet‘ndx) ∧ (TopSet‘ndx) ∈ ℕ)
54slotex 12705 . . . . 5 (𝑊𝑉 → (TopSet‘𝑊) ∈ V)
63, 5eqeltrid 2283 . . . 4 (𝑊𝑉𝐽 ∈ V)
7 topnval.1 . . . . 5 𝐵 = (Base‘𝑊)
8 baseslid 12735 . . . . . 6 (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ)
98slotex 12705 . . . . 5 (𝑊𝑉 → (Base‘𝑊) ∈ V)
107, 9eqeltrid 2283 . . . 4 (𝑊𝑉𝐵 ∈ V)
11 fnovex 5955 . . . 4 (( ↾t Fn (V × V) ∧ 𝐽 ∈ V ∧ 𝐵 ∈ V) → (𝐽t 𝐵) ∈ V)
122, 6, 10, 11mp3an2i 1353 . . 3 (𝑊𝑉 → (𝐽t 𝐵) ∈ V)
13 fveq2 5558 . . . . . 6 (𝑤 = 𝑊 → (TopSet‘𝑤) = (TopSet‘𝑊))
1413, 3eqtr4di 2247 . . . . 5 (𝑤 = 𝑊 → (TopSet‘𝑤) = 𝐽)
15 fveq2 5558 . . . . . 6 (𝑤 = 𝑊 → (Base‘𝑤) = (Base‘𝑊))
1615, 7eqtr4di 2247 . . . . 5 (𝑤 = 𝑊 → (Base‘𝑤) = 𝐵)
1714, 16oveq12d 5940 . . . 4 (𝑤 = 𝑊 → ((TopSet‘𝑤) ↾t (Base‘𝑤)) = (𝐽t 𝐵))
18 df-topn 12913 . . . 4 TopOpen = (𝑤 ∈ V ↦ ((TopSet‘𝑤) ↾t (Base‘𝑤)))
1917, 18fvmptg 5637 . . 3 ((𝑊 ∈ V ∧ (𝐽t 𝐵) ∈ V) → (TopOpen‘𝑊) = (𝐽t 𝐵))
201, 12, 19syl2anc 411 . 2 (𝑊𝑉 → (TopOpen‘𝑊) = (𝐽t 𝐵))
2120eqcomd 2202 1 (𝑊𝑉 → (𝐽t 𝐵) = (TopOpen‘𝑊))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1364  wcel 2167  Vcvv 2763   × cxp 4661   Fn wfn 5253  cfv 5258  (class class class)co 5922  Basecbs 12678  TopSetcts 12761  t crest 12910  TopOpenctopn 12911
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4148  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-cnex 7970  ax-resscn 7971  ax-1re 7973  ax-addrcl 7976
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-ov 5925  df-oprab 5926  df-mpo 5927  df-1st 6198  df-2nd 6199  df-inn 8991  df-2 9049  df-3 9050  df-4 9051  df-5 9052  df-6 9053  df-7 9054  df-8 9055  df-9 9056  df-ndx 12681  df-slot 12682  df-base 12684  df-tset 12774  df-rest 12912  df-topn 12913
This theorem is referenced by:  topnidg  12923  topnpropgd  12924  mgptopng  13485
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