Theorem tposfun 8297

Description: The transposition of a function is a function. (Contributed by Mario Carneiro, 10-Sep-2015.)

Assertion

Ref	Expression
tposfun	⊢ (Fun 𝐹 → Fun tpos 𝐹)

Proof of Theorem tposfun

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		funmpt 6606	. . 3 ⊢ Fun (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})
2		funco 6608	. . 3 ⊢ ((Fun 𝐹 ∧ Fun (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})) → Fun (𝐹 ∘ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})))
3	1, 2	mpan2 704	. 2 ⊢ (Fun 𝐹 → Fun (𝐹 ∘ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})))
4		df-tpos 8281	. . 3 ⊢ tpos 𝐹 = (𝐹 ∘ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥}))
5	4	funeqi 6588	. 2 ⊢ (Fun tpos 𝐹 ↔ Fun (𝐹 ∘ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})))
6	3, 5	sylibr 237	1 ⊢ (Fun 𝐹 → Fun tpos 𝐹)

This proof depends on syntax axioms:   → wi 4   ∪ cun 4152  ∅c0 4281  {csn 4588  ∪ cuni 4872   ↦ cmpt 5192  ^◡ccnv 5657  dom cdm 5658   ∘ ccom 5662  Fun wfun 6560  tpos ctpos 8280

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-sep 5255  ax-pr 5398

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4841  df-br 5109  df-opab 5174  df-mpt 5193  df-id 5553  df-xp 5664  df-rel 5665  df-cnv 5666  df-co 5667  df-fun 6568  df-tpos 8281

This theorem is used by:  tposfn2  8303