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Theorem 2basgeng 14715
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 13256 . . . . 5 (𝐵𝑉 → (topGen‘𝐵) ∈ V)
213ad2ant1 1021 . . . 4 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐵) ∈ V)
3 simp3 1002 . . . 4 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐶 ⊆ (topGen‘𝐵))
42, 3ssexd 4201 . . 3 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐶 ∈ V)
5 simp2 1001 . . 3 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐵𝐶)
6 tgss 14696 . . 3 ((𝐶 ∈ V ∧ 𝐵𝐶) → (topGen‘𝐵) ⊆ (topGen‘𝐶))
74, 5, 6syl2anc 411 . 2 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐵) ⊆ (topGen‘𝐶))
8 simp1 1000 . . . 4 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → 𝐵𝑉)
9 tgss3 14711 . . . 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 3219 1 ((𝐵𝑉𝐵𝐶𝐶 ⊆ (topGen‘𝐵)) → (topGen‘𝐵) = (topGen‘𝐶))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  w3a 981   = wceq 1373  wcel 2178  Vcvv 2777  wss 3175  cfv 5291  topGenctg 13247
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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2180  ax-14 2181  ax-ext 2189  ax-sep 4179  ax-pow 4235  ax-pr 4270  ax-un 4499
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ral 2491  df-rex 2492  df-v 2779  df-sbc 3007  df-un 3179  df-in 3181  df-ss 3188  df-pw 3629  df-sn 3650  df-pr 3651  df-op 3653  df-uni 3866  df-iun 3944  df-br 4061  df-opab 4123  df-mpt 4124  df-id 4359  df-xp 4700  df-rel 4701  df-cnv 4702  df-co 4703  df-dm 4704  df-iota 5252  df-fun 5293  df-fv 5299  df-topgen 13253
This theorem is referenced by:  txbasval  14900  tgioo  15187  tgqioo  15188
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