Theorem rfovfvfvd 44460

Description: Value of the operator, (𝐴𝑂𝐵), which maps between relations and functions for relations between base sets, 𝐴 and 𝐵, relation 𝑅, and left element 𝑋. (Contributed by RP, 25-Apr-2021.)

Hypotheses

Ref	Expression
rfovd.rf	⊢ 𝑂 = (𝑎 ∈ V, 𝑏 ∈ V ↦ (𝑟 ∈ 𝒫 (𝑎 × 𝑏) ↦ (𝑥 ∈ 𝑎 ↦ {𝑦 ∈ 𝑏 ∣ 𝑥𝑟𝑦})))
rfovd.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
rfovd.b	⊢ (𝜑 → 𝐵 ∈ 𝑊)
rfovfvd.r	⊢ (𝜑 → 𝑅 ∈ 𝒫 (𝐴 × 𝐵))
rfovfvd.f	⊢ 𝐹 = (𝐴𝑂𝐵)
rfovfvfvd.x	⊢ (𝜑 → 𝑋 ∈ 𝐴)
rfovfvfvd.g	⊢ 𝐺 = (𝐹‘𝑅)

Assertion

Ref	Expression
rfovfvfvd	⊢ (𝜑 → (𝐺‘𝑋) = {𝑦 ∈ 𝐵 ∣ 𝑋𝑅𝑦})

Distinct variable groups:   𝐴,𝑎,𝑏,𝑟,𝑥   𝐵,𝑎,𝑏,𝑟,𝑥,𝑦   𝑅,𝑟,𝑥,𝑦   𝑥,𝑋,𝑦   𝜑,𝑎,𝑏,𝑟,𝑥

Allowed substitution hints:   𝜑(𝑦)   𝐴(𝑦)   𝑅(𝑎,𝑏)   𝐹(𝑥,𝑦,𝑟,𝑎,𝑏)   𝐺(𝑥,𝑦,𝑟,𝑎,𝑏)   𝑂(𝑥,𝑦,𝑟,𝑎,𝑏)   𝑉(𝑥,𝑦,𝑟,𝑎,𝑏)   𝑊(𝑥,𝑦,𝑟,𝑎,𝑏)   𝑋(𝑟,𝑎,𝑏)

Proof of Theorem rfovfvfvd

Step	Hyp	Ref	Expression
1		rfovfvfvd.g	. . 3 ⊢ 𝐺 = (𝐹‘𝑅)
2		rfovd.rf	. . . 4 ⊢ 𝑂 = (𝑎 ∈ V, 𝑏 ∈ V ↦ (𝑟 ∈ 𝒫 (𝑎 × 𝑏) ↦ (𝑥 ∈ 𝑎 ↦ {𝑦 ∈ 𝑏 ∣ 𝑥𝑟𝑦})))
3		rfovd.a	. . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
4		rfovd.b	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
5		rfovfvd.r	. . . 4 ⊢ (𝜑 → 𝑅 ∈ 𝒫 (𝐴 × 𝐵))
6		rfovfvd.f	. . . 4 ⊢ 𝐹 = (𝐴𝑂𝐵)
7	2, 3, 4, 5, 6	rfovfvd 44459	. . 3 ⊢ (𝜑 → (𝐹‘𝑅) = (𝑥 ∈ 𝐴 ↦ {𝑦 ∈ 𝐵 ∣ 𝑥𝑅𝑦}))
8	1, 7	eqtrid 2788	. 2 ⊢ (𝜑 → 𝐺 = (𝑥 ∈ 𝐴 ↦ {𝑦 ∈ 𝐵 ∣ 𝑥𝑅𝑦}))
9		breq1 5077	. . . 4 ⊢ (𝑥 = 𝑋 → (𝑥𝑅𝑦 ↔ 𝑋𝑅𝑦))
10	9	rabbidv 3400	. . 3 ⊢ (𝑥 = 𝑋 → {𝑦 ∈ 𝐵 ∣ 𝑥𝑅𝑦} = {𝑦 ∈ 𝐵 ∣ 𝑋𝑅𝑦})
11	10	adantl 483	. 2 ⊢ ((𝜑 ∧ 𝑥 = 𝑋) → {𝑦 ∈ 𝐵 ∣ 𝑥𝑅𝑦} = {𝑦 ∈ 𝐵 ∣ 𝑋𝑅𝑦})
12		rfovfvfvd.x	. 2 ⊢ (𝜑 → 𝑋 ∈ 𝐴)
13		rabexg 5267	. . 3 ⊢ (𝐵 ∈ 𝑊 → {𝑦 ∈ 𝐵 ∣ 𝑋𝑅𝑦} ∈ V)
14	4, 13	syl 17	. 2 ⊢ (𝜑 → {𝑦 ∈ 𝐵 ∣ 𝑋𝑅𝑦} ∈ V)
15	8, 11, 12, 14	fvmptd 6946	1 ⊢ (𝜑 → (𝐺‘𝑋) = {𝑦 ∈ 𝐵 ∣ 𝑋𝑅𝑦})

Syntax hints:   → wi 4   = wceq 1548   ∈ wcel 2121  {crab 3393  Vcvv 3433  𝒫 cpw 4531   class class class wbr 5074   ↦ cmpt 5155   × cxp 5618  ‘cfv 6488  (class class class)co 7359   ∈ cmpo 7361

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1975  ax-7 2016  ax-8 2123  ax-9 2131  ax-10 2154  ax-11 2170  ax-12 2191  ax-ext 2713  ax-rep 5201  ax-sep 5220  ax-nul 5230  ax-pow 5296  ax-pr 5364  ax-un 7681

This theorem depends on definitions:  df-bi 209  df-an 398  df-or 855  df-3an 1095  df-tru 1551  df-fal 1561  df-ex 1788  df-nf 1792  df-sb 2075  df-mo 2545  df-eu 2575  df-clab 2720  df-cleq 2733  df-clel 2816  df-nfc 2890  df-ne 2937  df-ral 3056  df-rex 3066  df-reu 3347  df-rab 3394  df-v 3435  df-sbc 3725  df-csb 3833  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-nul 4264  df-if 4457  df-pw 4533  df-sn 4558  df-pr 4560  df-op 4564  df-uni 4841  df-iun 4925  df-br 5075  df-opab 5137  df-mpt 5156  df-id 5515  df-xp 5626  df-rel 5627  df-cnv 5628  df-co 5629  df-dm 5630  df-rn 5631  df-res 5632  df-ima 5633  df-iota 6444  df-fun 6490  df-fn 6491  df-f 6492  df-f1 6493  df-fo 6494  df-f1o 6495  df-fv 6496  df-ov 7362  df-oprab 7363  df-mpo 7364

This theorem is referenced by: (None)