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| Mirrors > Home > MPE Home > Th. List > ndmovcom | Structured version Visualization version GIF version | ||
| Description: Any operation is commutative outside its domain. (Contributed by NM, 24-Aug-1995.) |
| Ref | Expression |
|---|---|
| ndmov.1 | ⊢ dom 𝐹 = (𝑆 × 𝑆) |
| Ref | Expression |
|---|---|
| ndmovcom | ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴𝐹𝐵) = (𝐵𝐹𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ndmov.1 | . . 3 ⊢ dom 𝐹 = (𝑆 × 𝑆) | |
| 2 | 1 | ndmov 7576 | . 2 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴𝐹𝐵) = ∅) |
| 3 | ancom 460 | . . 3 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ↔ (𝐵 ∈ 𝑆 ∧ 𝐴 ∈ 𝑆)) | |
| 4 | 1 | ndmov 7576 | . . 3 ⊢ (¬ (𝐵 ∈ 𝑆 ∧ 𝐴 ∈ 𝑆) → (𝐵𝐹𝐴) = ∅) |
| 5 | 3, 4 | sylnbi 330 | . 2 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐵𝐹𝐴) = ∅) |
| 6 | 2, 5 | eqtr4d 2768 | 1 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴𝐹𝐵) = (𝐵𝐹𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∅c0 4299 × cxp 5639 dom cdm 5641 (class class class)co 7390 |
| 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-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pr 5390 |
| 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-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3920 df-un 3922 df-ss 3934 df-nul 4300 df-if 4492 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-opab 5173 df-xp 5647 df-dm 5651 df-iota 6467 df-fv 6522 df-ov 7393 |
| This theorem is referenced by: addcompi 10854 mulcompi 10856 addcompq 10910 addcomnq 10911 mulcompq 10912 mulcomnq 10913 addcompr 10981 mulcompr 10983 addcomsr 11047 mulcomsr 11049 addcomgi 44452 |
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