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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 6860 | . 2 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴𝐹𝐵) = ∅) |
3 | ancom 465 | . . 3 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ↔ (𝐵 ∈ 𝑆 ∧ 𝐴 ∈ 𝑆)) | |
4 | 1 | ndmov 6860 | . . 3 ⊢ (¬ (𝐵 ∈ 𝑆 ∧ 𝐴 ∈ 𝑆) → (𝐵𝐹𝐴) = ∅) |
5 | 3, 4 | sylnbi 319 | . 2 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐵𝐹𝐴) = ∅) |
6 | 2, 5 | eqtr4d 2688 | 1 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴𝐹𝐵) = (𝐵𝐹𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 383 = wceq 1523 ∈ wcel 2030 ∅c0 3948 × cxp 5141 dom cdm 5143 (class class class)co 6690 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ral 2946 df-rex 2947 df-rab 2950 df-v 3233 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-nul 3949 df-if 4120 df-sn 4211 df-pr 4213 df-op 4217 df-uni 4469 df-br 4686 df-opab 4746 df-xp 5149 df-dm 5153 df-iota 5889 df-fv 5934 df-ov 6693 |
This theorem is referenced by: addcompi 9754 mulcompi 9756 addcompq 9810 addcomnq 9811 mulcompq 9812 mulcomnq 9813 addcompr 9881 mulcompr 9883 addcomsr 9946 mulcomsr 9948 addcomgi 38977 |
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