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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 3209 | . 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 7581 | . . 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 2147 ∀wral 3080 × cxp 5656 Fn wfn 6561 (class class class)co 7451 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pr 5398 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-iota 6520 df-fun 6568 df-fn 6569 df-fv 6574 df-ov 7454 |
| This theorem is used by: prcofdiag1 50859 prcofdiag 50860 oppfdiag1 50880 oppfdiag 50882 |
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