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| Mirrors > Home > MPE Home > Th. List > ndmovrcl | Structured version Visualization version GIF version | ||
| Description: Reverse closure law, when an operation's domain doesn't contain the empty set. (Contributed by NM, 3-Feb-1996.) |
| Ref | Expression |
|---|---|
| ndmov.1 | ⊢ dom 𝐹 = (𝑆 × 𝑆) |
| ndmovrcl.3 | ⊢ ¬ ∅ ∈ 𝑆 |
| Ref | Expression |
|---|---|
| ndmovrcl | ⊢ ((𝐴𝐹𝐵) ∈ 𝑆 → (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ndmovrcl.3 | . . 3 ⊢ ¬ ∅ ∈ 𝑆 | |
| 2 | ndmov.1 | . . . . 5 ⊢ dom 𝐹 = (𝑆 × 𝑆) | |
| 3 | 2 | ndmov 7629 | . . . 4 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴𝐹𝐵) = ∅) |
| 4 | 3 | eleq1d 2849 | . . 3 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → ((𝐴𝐹𝐵) ∈ 𝑆 ↔ ∅ ∈ 𝑆)) |
| 5 | 1, 4 | mtbiri 330 | . 2 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → ¬ (𝐴𝐹𝐵) ∈ 𝑆) |
| 6 | 5 | con4i 115 | 1 ⊢ ((𝐴𝐹𝐵) ∈ 𝑆 → (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ∅c0 4281 × cxp 5653 dom cdm 5655 (class class class)co 7443 |
| 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-ext 2735 ax-sep 5252 ax-nul 5263 ax-pr 5395 |
| 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-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 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 4839 df-uni 4871 df-br 5107 df-opab 5171 df-xp 5661 df-dm 5665 df-iota 6512 df-fv 6566 df-ov 7446 |
| This theorem is used by: ndmovass 7633 ndmovdistr 7634 ndmovord 7635 ndmovordi 7636 caovmo 7682 brecop2 8860 eceqoveq 8871 addcanpi 11011 mulcanpi 11012 ordpipq 11054 recmulnq 11076 recclnq 11078 ltexnq 11087 nsmallnq 11089 ltbtwnnq 11090 prlem934 11145 ltaddpr 11146 ltaddpr2 11147 ltexprlem2 11149 ltexprlem3 11150 ltexprlem4 11151 ltexprlem6 11153 ltexprlem7 11154 addcanpr 11158 prlem936 11159 mappsrpr 11220 |
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