Theorem caovcan 7616

Description: Convert an operation cancellation law to class notation. (Contributed by NM, 20-Aug-1995.)

Hypotheses

Ref	Expression
caovcan.1	⊢ 𝐶 ∈ V
caovcan.2	⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → ((𝑥𝐹𝑦) = (𝑥𝐹𝑧) → 𝑦 = 𝑧))

Assertion

Ref	Expression
caovcan	⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → ((𝐴𝐹𝐵) = (𝐴𝐹𝐶) → 𝐵 = 𝐶))

Distinct variable groups:   𝑥,𝑦,𝑧,𝐴   𝑥,𝐵,𝑦,𝑧   𝑥,𝐶,𝑦,𝑧   𝑥,𝐹,𝑦,𝑧   𝑥,𝑆,𝑦,𝑧

Proof of Theorem caovcan

Step	Hyp	Ref	Expression
1		oveq1 7417	. . . 4 ⊢ (𝑥 = 𝐴 → (𝑥𝐹𝑦) = (𝐴𝐹𝑦))
2		oveq1 7417	. . . 4 ⊢ (𝑥 = 𝐴 → (𝑥𝐹𝐶) = (𝐴𝐹𝐶))
3	1, 2	eqeq12d 2752	. . 3 ⊢ (𝑥 = 𝐴 → ((𝑥𝐹𝑦) = (𝑥𝐹𝐶) ↔ (𝐴𝐹𝑦) = (𝐴𝐹𝐶)))
4	3	imbi1d 341	. 2 ⊢ (𝑥 = 𝐴 → (((𝑥𝐹𝑦) = (𝑥𝐹𝐶) → 𝑦 = 𝐶) ↔ ((𝐴𝐹𝑦) = (𝐴𝐹𝐶) → 𝑦 = 𝐶)))
5		oveq2 7418	. . . 4 ⊢ (𝑦 = 𝐵 → (𝐴𝐹𝑦) = (𝐴𝐹𝐵))
6	5	eqeq1d 2738	. . 3 ⊢ (𝑦 = 𝐵 → ((𝐴𝐹𝑦) = (𝐴𝐹𝐶) ↔ (𝐴𝐹𝐵) = (𝐴𝐹𝐶)))
7		eqeq1 2740	. . 3 ⊢ (𝑦 = 𝐵 → (𝑦 = 𝐶 ↔ 𝐵 = 𝐶))
8	6, 7	imbi12d 344	. 2 ⊢ (𝑦 = 𝐵 → (((𝐴𝐹𝑦) = (𝐴𝐹𝐶) → 𝑦 = 𝐶) ↔ ((𝐴𝐹𝐵) = (𝐴𝐹𝐶) → 𝐵 = 𝐶)))
9		caovcan.1	. . 3 ⊢ 𝐶 ∈ V
10		oveq2 7418	. . . . . 6 ⊢ (𝑧 = 𝐶 → (𝑥𝐹𝑧) = (𝑥𝐹𝐶))
11	10	eqeq2d 2747	. . . . 5 ⊢ (𝑧 = 𝐶 → ((𝑥𝐹𝑦) = (𝑥𝐹𝑧) ↔ (𝑥𝐹𝑦) = (𝑥𝐹𝐶)))
12		eqeq2 2748	. . . . 5 ⊢ (𝑧 = 𝐶 → (𝑦 = 𝑧 ↔ 𝑦 = 𝐶))
13	11, 12	imbi12d 344	. . . 4 ⊢ (𝑧 = 𝐶 → (((𝑥𝐹𝑦) = (𝑥𝐹𝑧) → 𝑦 = 𝑧) ↔ ((𝑥𝐹𝑦) = (𝑥𝐹𝐶) → 𝑦 = 𝐶)))
14	13	imbi2d 340	. . 3 ⊢ (𝑧 = 𝐶 → (((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → ((𝑥𝐹𝑦) = (𝑥𝐹𝑧) → 𝑦 = 𝑧)) ↔ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → ((𝑥𝐹𝑦) = (𝑥𝐹𝐶) → 𝑦 = 𝐶))))
15		caovcan.2	. . 3 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → ((𝑥𝐹𝑦) = (𝑥𝐹𝑧) → 𝑦 = 𝑧))
16	9, 14, 15	vtocl 3542	. 2 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → ((𝑥𝐹𝑦) = (𝑥𝐹𝐶) → 𝑦 = 𝐶))
17	4, 8, 16	vtocl2ga 3562	1 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → ((𝐴𝐹𝐵) = (𝐴𝐹𝐶) → 𝐵 = 𝐶))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1540   ∈ wcel 2109  Vcvv 3464  (class class class)co 7410

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2715  df-cleq 2728  df-clel 2810  df-rab 3421  df-v 3466  df-dif 3934  df-un 3936  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4889  df-br 5125  df-iota 6489  df-fv 6544  df-ov 7413

This theorem is referenced by:  ecopovtrn  8839