Theorem fntopon 21526

Description: The class TopOn is a function with domain V. Analogue for topologies of fnmre 16856 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 21522	. 2 ⊢ Fun TopOn
2		dmtopon 21525	. 2 ⊢ dom TopOn = V
3		df-fn 6353	. 2 ⊢ (TopOn Fn V ↔ (Fun TopOn ∧ dom TopOn = V))
4	1, 2, 3	mpbir2an 709	1 ⊢ TopOn Fn V

Syntax hints:   = wceq 1533  Vcvv 3495  dom cdm 5550  Fun wfun 6344   Fn wfn 6345  TopOnctopon 21512

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 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322

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 3497  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-fun 6352  df-fn 6353  df-topon 21513

This theorem is referenced by:  toprntopon  21527