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| Mirrors > Home > MPE Home > Th. List > Mathboxes > eqfnovd | Structured version Visualization version GIF version | ||
| Description: Deduction for equality of operations. (Contributed by Zhi Wang, 19-Nov-2025.) |
| Ref | Expression |
|---|---|
| eqfnovd.1 | ⊢ (𝜑 → 𝐹 Fn (𝐴 × 𝐵)) |
| eqfnovd.2 | ⊢ (𝜑 → 𝐺 Fn (𝐴 × 𝐵)) |
| eqfnovd.3 | ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) → (𝑥𝐹𝑦) = (𝑥𝐺𝑦)) |
| Ref | Expression |
|---|---|
| eqfnovd | ⊢ (𝜑 → 𝐹 = 𝐺) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqfnovd.3 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) → (𝑥𝐹𝑦) = (𝑥𝐺𝑦)) | |
| 2 | 1 | ralrimivva 3210 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 (𝑥𝐹𝑦) = (𝑥𝐺𝑦)) |
| 3 | eqfnovd.1 | . . 3 ⊢ (𝜑 → 𝐹 Fn (𝐴 × 𝐵)) | |
| 4 | eqfnovd.2 | . . 3 ⊢ (𝜑 → 𝐺 Fn (𝐴 × 𝐵)) | |
| 5 | eqfnov2 7546 | . . 3 ⊢ ((𝐹 Fn (𝐴 × 𝐵) ∧ 𝐺 Fn (𝐴 × 𝐵)) → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 (𝑥𝐹𝑦) = (𝑥𝐺𝑦))) | |
| 6 | 3, 4, 5 | syl2anc 596 | . 2 ⊢ (𝜑 → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 (𝑥𝐹𝑦) = (𝑥𝐺𝑦))) |
| 7 | 2, 6 | mpbird 260 | 1 ⊢ (𝜑 → 𝐹 = 𝐺) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2146 ∀wral 3081 × cxp 5661 Fn wfn 6535 (class class class)co 7416 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pr 5406 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-fv 6548 df-ov 7419 |
| This theorem is used by: prcofdiag1 50204 prcofdiag 50205 oppfdiag1 50225 oppfdiag 50227 |
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