Theorem ipffn 21604

Description: The inner product operation is a function. (Contributed by Mario Carneiro, 20-Sep-2015.)

Hypotheses

Ref	Expression
ipffn.1	⊢ 𝑉 = (Base‘𝑊)
ipffn.2	⊢ , = (·if‘𝑊)

Assertion

Ref	Expression
ipffn	⊢ , Fn (𝑉 × 𝑉)

Proof of Theorem ipffn

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ipffn.1	. . 3 ⊢ 𝑉 = (Base‘𝑊)
2		eqid 2734	. . 3 ⊢ (·𝑖‘𝑊) = (·𝑖‘𝑊)
3		ipffn.2	. . 3 ⊢ , = (·if‘𝑊)
4	1, 2, 3	ipffval 21601	. 2 ⊢ , = (𝑥 ∈ 𝑉, 𝑦 ∈ 𝑉 ↦ (𝑥(·𝑖‘𝑊)𝑦))
5		ovex 7389	. 2 ⊢ (𝑥(·𝑖‘𝑊)𝑦) ∈ V
6	4, 5	fnmpoi 8012	1 ⊢ , Fn (𝑉 × 𝑉)

Syntax hints:   = wceq 1541   × cxp 5620   Fn wfn 6485  ‘cfv 6490  (class class class)co 7356  Basecbs 17134  ·_𝑖cip 17180  ·_ifcipf 21578

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2706  ax-sep 5239  ax-nul 5249  ax-pow 5308  ax-pr 5375  ax-un 7678

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2567  df-clab 2713  df-cleq 2726  df-clel 2809  df-nfc 2883  df-ne 2931  df-ral 3050  df-rex 3059  df-rab 3398  df-v 3440  df-sbc 3739  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4284  df-if 4478  df-pw 4554  df-sn 4579  df-pr 4581  df-op 4585  df-uni 4862  df-iun 4946  df-br 5097  df-opab 5159  df-mpt 5178  df-id 5517  df-xp 5628  df-rel 5629  df-cnv 5630  df-co 5631  df-dm 5632  df-rn 5633  df-res 5634  df-ima 5635  df-iota 6446  df-fun 6492  df-fn 6493  df-f 6494  df-fv 6498  df-ov 7359  df-oprab 7360  df-mpo 7361  df-1st 7931  df-2nd 7932  df-ipf 21580

This theorem is referenced by: (None)