Theorem fntopon 21531

Description: The class TopOn is a function with domain the universal class V. Analogue for topologies of fnmre 16861 for Moore collections. (Contributed by BJ, 29-Apr-2021.)

Assertion

Ref	Expression
fntopon	⊢ TopOn Fn V

Proof of Theorem fntopon

Step	Hyp	Ref	Expression
1		funtopon 21527	. 2 ⊢ Fun TopOn
2		dmtopon 21530	. 2 ⊢ dom TopOn = V
3		df-fn 6357	. 2 ⊢ (TopOn Fn V ↔ (Fun TopOn ∧ dom TopOn = V))
4	1, 2, 3	mpbir2an 709	1 ⊢ TopOn Fn V

Syntax hints:   = wceq 1533  Vcvv 3494  dom cdm 5554  Fun wfun 6348   Fn wfn 6349  TopOnctopon 21517

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-sep 5202  ax-nul 5209  ax-pow 5265  ax-pr 5329

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rab 3147  df-v 3496  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4838  df-br 5066  df-opab 5128  df-mpt 5146  df-id 5459  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-fun 6356  df-fn 6357  df-topon 21518

This theorem is referenced by:  toprntopon  21532