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Theorem 2basgeng 14996
Description: Conditions that determine the equality of two generated topologies. (Contributed by NM, 8-May-2007.) (Revised by Jim Kingdon, 5-Mar-2023.)
Assertion
Ref Expression
2basgeng ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐵) = (topGen‘𝐶))

Proof of Theorem 2basgeng
StepHypRef Expression
1 tgvalex 13497 . . . . 5 (𝐵𝑉 → (topGen‘𝐵) ∈ V)
213ad2ant1 1045 . . . 4 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐵) ∈ V)
3 simp3 1026 . . . 4 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐶 ⊆ (topGen‘𝐵))
42, 3ssexd 4252 . . 3 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐶 ∈ V)
5 simp2 1025 . . 3 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐵𝐶)
6 tgss 14977 . . 3 ((𝐶 ∈ V ∧ 𝐵𝐶) → (topGen‘𝐵) ⊆ (topGen‘𝐶))
74, 5, 6syl2anc 411 . 2 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐵) ⊆ (topGen‘𝐶))
8 simp1 1024 . . . 4 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐵𝑉)
9 tgss3 14992 . . . 4 ((𝐶 ∈ V ∧ 𝐵𝑉) → ((topGen‘𝐶) ⊆ (topGen‘𝐵) ↔ 𝐶 ⊆ (topGen‘𝐵)))
104, 8, 9syl2anc 411 . . 3 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → ((topGen‘𝐶) ⊆ (topGen‘𝐵) ↔ 𝐶 ⊆ (topGen‘𝐵)))
113, 10mpbird 167 . 2 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐶) ⊆ (topGen‘𝐵))
127, 11eqssd 3257 1 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐵) = (topGen‘𝐶))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  w3a 1005   = wceq 1398  wcel 2205  Vcvv 2815  wss 3213  cfv 5354  topGenctg 13488
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324  ax-un 4556
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-sbc 3045  df-un 3217  df-in 3219  df-ss 3226  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-iun 3995  df-br 4112  df-opab 4174  df-mpt 4175  df-id 4416  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-iota 5314  df-fun 5356  df-fv 5362  df-topgen 13494
This theorem is referenced by:  txbasval  15181  tgioo  15468  tgqioo  15469
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