Theorem off 6912

Description: The function operation produces a function. (Contributed by Mario Carneiro, 20-Jul-2014.)

Hypotheses

Ref	Expression
off.1	⊢ ((𝜑 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑇)) → (𝑥𝑅𝑦) ∈ 𝑈)
off.2	⊢ (𝜑 → 𝐹:𝐴⟶𝑆)
off.3	⊢ (𝜑 → 𝐺:𝐵⟶𝑇)
off.4	⊢ (𝜑 → 𝐴 ∈ 𝑉)
off.5	⊢ (𝜑 → 𝐵 ∈ 𝑊)
off.6	⊢ (𝐴 ∩ 𝐵) = 𝐶

Assertion

Ref	Expression
off	⊢ (𝜑 → (𝐹 ∘𝑓 𝑅𝐺):𝐶⟶𝑈)

Distinct variable groups:   𝑦,𝐺   𝑥,𝑦,𝜑   𝑥,𝑆,𝑦   𝑥,𝑇,𝑦   𝑥,𝐹,𝑦   𝑥,𝑅,𝑦   𝑥,𝑈,𝑦

Allowed substitution hints:   𝐴(𝑥,𝑦)   𝐵(𝑥,𝑦)   𝐶(𝑥,𝑦)   𝐺(𝑥)   𝑉(𝑥,𝑦)   𝑊(𝑥,𝑦)

Proof of Theorem off

Dummy variable 𝑧 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		off.2	. . . . 5 ⊢ (𝜑 → 𝐹:𝐴⟶𝑆)
2		off.6	. . . . . . 7 ⊢ (𝐴 ∩ 𝐵) = 𝐶
3		inss1 3833	. . . . . . 7 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐴
4	2, 3	eqsstr3i 3636	. . . . . 6 ⊢ 𝐶 ⊆ 𝐴
5	4	sseli 3599	. . . . 5 ⊢ (𝑧 ∈ 𝐶 → 𝑧 ∈ 𝐴)
6		ffvelrn 6357	. . . . 5 ⊢ ((𝐹:𝐴⟶𝑆 ∧ 𝑧 ∈ 𝐴) → (𝐹‘𝑧) ∈ 𝑆)
7	1, 5, 6	syl2an 494	. . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐶) → (𝐹‘𝑧) ∈ 𝑆)
8		off.3	. . . . 5 ⊢ (𝜑 → 𝐺:𝐵⟶𝑇)
9		inss2 3834	. . . . . . 7 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵
10	2, 9	eqsstr3i 3636	. . . . . 6 ⊢ 𝐶 ⊆ 𝐵
11	10	sseli 3599	. . . . 5 ⊢ (𝑧 ∈ 𝐶 → 𝑧 ∈ 𝐵)
12		ffvelrn 6357	. . . . 5 ⊢ ((𝐺:𝐵⟶𝑇 ∧ 𝑧 ∈ 𝐵) → (𝐺‘𝑧) ∈ 𝑇)
13	8, 11, 12	syl2an 494	. . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐶) → (𝐺‘𝑧) ∈ 𝑇)
14		off.1	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑇)) → (𝑥𝑅𝑦) ∈ 𝑈)
15	14	ralrimivva 2971	. . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑇 (𝑥𝑅𝑦) ∈ 𝑈)
16	15	adantr 481	. . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐶) → ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑇 (𝑥𝑅𝑦) ∈ 𝑈)
17		oveq1 6657	. . . . . 6 ⊢ (𝑥 = (𝐹‘𝑧) → (𝑥𝑅𝑦) = ((𝐹‘𝑧)𝑅𝑦))
18	17	eleq1d 2686	. . . . 5 ⊢ (𝑥 = (𝐹‘𝑧) → ((𝑥𝑅𝑦) ∈ 𝑈 ↔ ((𝐹‘𝑧)𝑅𝑦) ∈ 𝑈))
19		oveq2 6658	. . . . . 6 ⊢ (𝑦 = (𝐺‘𝑧) → ((𝐹‘𝑧)𝑅𝑦) = ((𝐹‘𝑧)𝑅(𝐺‘𝑧)))
20	19	eleq1d 2686	. . . . 5 ⊢ (𝑦 = (𝐺‘𝑧) → (((𝐹‘𝑧)𝑅𝑦) ∈ 𝑈 ↔ ((𝐹‘𝑧)𝑅(𝐺‘𝑧)) ∈ 𝑈))
21	18, 20	rspc2va 3323	. . . 4 ⊢ ((((𝐹‘𝑧) ∈ 𝑆 ∧ (𝐺‘𝑧) ∈ 𝑇) ∧ ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑇 (𝑥𝑅𝑦) ∈ 𝑈) → ((𝐹‘𝑧)𝑅(𝐺‘𝑧)) ∈ 𝑈)
22	7, 13, 16, 21	syl21anc 1325	. . 3 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐶) → ((𝐹‘𝑧)𝑅(𝐺‘𝑧)) ∈ 𝑈)
23		eqid 2622	. . 3 ⊢ (𝑧 ∈ 𝐶 ↦ ((𝐹‘𝑧)𝑅(𝐺‘𝑧))) = (𝑧 ∈ 𝐶 ↦ ((𝐹‘𝑧)𝑅(𝐺‘𝑧)))
24	22, 23	fmptd 6385	. 2 ⊢ (𝜑 → (𝑧 ∈ 𝐶 ↦ ((𝐹‘𝑧)𝑅(𝐺‘𝑧))):𝐶⟶𝑈)
25		ffn 6045	. . . . 5 ⊢ (𝐹:𝐴⟶𝑆 → 𝐹 Fn 𝐴)
26	1, 25	syl 17	. . . 4 ⊢ (𝜑 → 𝐹 Fn 𝐴)
27		ffn 6045	. . . . 5 ⊢ (𝐺:𝐵⟶𝑇 → 𝐺 Fn 𝐵)
28	8, 27	syl 17	. . . 4 ⊢ (𝜑 → 𝐺 Fn 𝐵)
29		off.4	. . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
30		off.5	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
31		eqidd 2623	. . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → (𝐹‘𝑧) = (𝐹‘𝑧))
32		eqidd 2623	. . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐵) → (𝐺‘𝑧) = (𝐺‘𝑧))
33	26, 28, 29, 30, 2, 31, 32	offval 6904	. . 3 ⊢ (𝜑 → (𝐹 ∘𝑓 𝑅𝐺) = (𝑧 ∈ 𝐶 ↦ ((𝐹‘𝑧)𝑅(𝐺‘𝑧))))
34	33	feq1d 6030	. 2 ⊢ (𝜑 → ((𝐹 ∘𝑓 𝑅𝐺):𝐶⟶𝑈 ↔ (𝑧 ∈ 𝐶 ↦ ((𝐹‘𝑧)𝑅(𝐺‘𝑧))):𝐶⟶𝑈))
35	24, 34	mpbird 247	1 ⊢ (𝜑 → (𝐹 ∘𝑓 𝑅𝐺):𝐶⟶𝑈)

Syntax hints:   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990  ∀wral 2912   ∩ cin 3573   ↦ cmpt 4729   Fn wfn 5883  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650   ∘_𝑓 cof 6895

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pr 4906

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-of 6897

This theorem is referenced by:  o1of2  14343  ghmplusg  18249  gsumzaddlem  18321  gsumzadd  18322  lcomf  18902  psrbagaddcl  19370  psraddcl  19383  psrvscacl  19393  psrbagev1  19510  evlslem3  19514  frlmup1  20137  mndvcl  20197  tsmsadd  21950  mbfmulc2lem  23414  mbfaddlem  23427  i1fadd  23462  i1fmul  23463  itg1addlem4  23466  i1fmulclem  23469  i1fmulc  23470  mbfi1flimlem  23489  itg2mulclem  23513  itg2mulc  23514  itg2monolem1  23517  itg2addlem  23525  dvaddbr  23701  dvmulbr  23702  dvaddf  23705  dvmulf  23706  dv11cn  23764  plyaddlem  23971  coeeulem  23980  coeaddlem  24005  plydivlem4  24051  jensenlem2  24714  jensen  24715  basellem7  24813  basellem9  24815  dchrmulcl  24974  ofrn  29441  sibfof  30402  signshf  30665  circlemethhgt  30721  poimirlem23  33432  poimirlem24  33433  poimirlem25  33434  poimirlem29  33438  poimirlem30  33439  poimirlem31  33440  poimirlem32  33441  itg2addnc  33464  ftc1anclem3  33487  ftc1anclem6  33490  ftc1anclem8  33492  lfladdcl  34358  lflvscl  34364  mzpclall  37290  mzpindd  37309  expgrowth  38534  binomcxplemnotnn0  38555  dvdivcncf  40142  ofaddmndmap  42122  amgmwlem  42548