Theorem topontopi 22424

Description: A topology on a given base set is a topology. (Contributed by Mario Carneiro, 13-Aug-2015.)

Hypothesis

Ref	Expression
topontopi.1	⊢ 𝐽 ∈ (TopOn‘𝐵)

Assertion

Ref	Expression
topontopi	⊢ 𝐽 ∈ Top

Proof of Theorem topontopi

Step	Hyp	Ref	Expression
1		topontopi.1	. 2 ⊢ 𝐽 ∈ (TopOn‘𝐵)
2		topontop 22422	. 2 ⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐽 ∈ Top)
3	1, 2	ax-mp 5	1 ⊢ 𝐽 ∈ Top

Syntax hints:   ∈ wcel 2106  ‘cfv 6543  Topctop 22402  TopOnctopon 22419

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-sep 5299  ax-nul 5306  ax-pow 5363  ax-pr 5427  ax-un 7727

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ral 3062  df-rex 3071  df-rab 3433  df-v 3476  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-nul 4323  df-if 4529  df-pw 4604  df-sn 4629  df-pr 4631  df-op 4635  df-uni 4909  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5574  df-xp 5682  df-rel 5683  df-cnv 5684  df-co 5685  df-dm 5686  df-iota 6495  df-fun 6545  df-fv 6551  df-topon 22420

This theorem is referenced by:  sn0top  22509  indistop  22512  letop  22717  dfac14  23129  cnfldtop  24307  sszcld  24340  iitop  24403  limccnp2  25416  cxpcn3  26263  lmlim  32996  pnfneige0  33000  sxbrsigalem4  33355  knoppcnlem10  35464  poimir  36607  islptre  44414  fourierdlem62  44963