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Mirrors > Home > MPE Home > Th. List > eqfnov | Structured version Visualization version GIF version |
Description: Equality of two operations is determined by their values. (Contributed by NM, 1-Sep-2005.) |
Ref | Expression |
---|---|
eqfnov | ⊢ ((𝐹 Fn (𝐴 × 𝐵) ∧ 𝐺 Fn (𝐶 × 𝐷)) → (𝐹 = 𝐺 ↔ ((𝐴 × 𝐵) = (𝐶 × 𝐷) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 (𝑥𝐹𝑦) = (𝑥𝐺𝑦)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqfnfv2 6455 | . 2 ⊢ ((𝐹 Fn (𝐴 × 𝐵) ∧ 𝐺 Fn (𝐶 × 𝐷)) → (𝐹 = 𝐺 ↔ ((𝐴 × 𝐵) = (𝐶 × 𝐷) ∧ ∀𝑧 ∈ (𝐴 × 𝐵)(𝐹‘𝑧) = (𝐺‘𝑧)))) | |
2 | fveq2 6332 | . . . . . 6 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → (𝐹‘𝑧) = (𝐹‘〈𝑥, 𝑦〉)) | |
3 | fveq2 6332 | . . . . . 6 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → (𝐺‘𝑧) = (𝐺‘〈𝑥, 𝑦〉)) | |
4 | 2, 3 | eqeq12d 2785 | . . . . 5 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ((𝐹‘𝑧) = (𝐺‘𝑧) ↔ (𝐹‘〈𝑥, 𝑦〉) = (𝐺‘〈𝑥, 𝑦〉))) |
5 | df-ov 6795 | . . . . . 6 ⊢ (𝑥𝐹𝑦) = (𝐹‘〈𝑥, 𝑦〉) | |
6 | df-ov 6795 | . . . . . 6 ⊢ (𝑥𝐺𝑦) = (𝐺‘〈𝑥, 𝑦〉) | |
7 | 5, 6 | eqeq12i 2784 | . . . . 5 ⊢ ((𝑥𝐹𝑦) = (𝑥𝐺𝑦) ↔ (𝐹‘〈𝑥, 𝑦〉) = (𝐺‘〈𝑥, 𝑦〉)) |
8 | 4, 7 | syl6bbr 278 | . . . 4 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ((𝐹‘𝑧) = (𝐺‘𝑧) ↔ (𝑥𝐹𝑦) = (𝑥𝐺𝑦))) |
9 | 8 | ralxp 5402 | . . 3 ⊢ (∀𝑧 ∈ (𝐴 × 𝐵)(𝐹‘𝑧) = (𝐺‘𝑧) ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 (𝑥𝐹𝑦) = (𝑥𝐺𝑦)) |
10 | 9 | anbi2i 601 | . 2 ⊢ (((𝐴 × 𝐵) = (𝐶 × 𝐷) ∧ ∀𝑧 ∈ (𝐴 × 𝐵)(𝐹‘𝑧) = (𝐺‘𝑧)) ↔ ((𝐴 × 𝐵) = (𝐶 × 𝐷) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 (𝑥𝐹𝑦) = (𝑥𝐺𝑦))) |
11 | 1, 10 | syl6bb 276 | 1 ⊢ ((𝐹 Fn (𝐴 × 𝐵) ∧ 𝐺 Fn (𝐶 × 𝐷)) → (𝐹 = 𝐺 ↔ ((𝐴 × 𝐵) = (𝐶 × 𝐷) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 (𝑥𝐹𝑦) = (𝑥𝐺𝑦)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 382 = wceq 1630 ∀wral 3060 〈cop 4320 × cxp 5247 Fn wfn 6026 ‘cfv 6031 (class class class)co 6792 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1869 ax-4 1884 ax-5 1990 ax-6 2056 ax-7 2092 ax-8 2146 ax-9 2153 ax-10 2173 ax-11 2189 ax-12 2202 ax-13 2407 ax-ext 2750 ax-sep 4912 ax-nul 4920 ax-pow 4971 ax-pr 5034 |
This theorem depends on definitions: df-bi 197 df-an 383 df-or 827 df-3an 1072 df-tru 1633 df-ex 1852 df-nf 1857 df-sb 2049 df-eu 2621 df-mo 2622 df-clab 2757 df-cleq 2763 df-clel 2766 df-nfc 2901 df-ral 3065 df-rex 3066 df-rab 3069 df-v 3351 df-sbc 3586 df-csb 3681 df-dif 3724 df-un 3726 df-in 3728 df-ss 3735 df-nul 4062 df-if 4224 df-sn 4315 df-pr 4317 df-op 4321 df-uni 4573 df-iun 4654 df-br 4785 df-opab 4845 df-mpt 4862 df-id 5157 df-xp 5255 df-rel 5256 df-cnv 5257 df-co 5258 df-dm 5259 df-rn 5260 df-res 5261 df-ima 5262 df-iota 5994 df-fun 6033 df-fn 6034 df-fv 6039 df-ov 6795 |
This theorem is referenced by: eqfnov2 6913 oprres 6948 ssceq 16692 sspg 27917 ssps 27919 sspmlem 27921 |
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