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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 7598 | . . . 4 ⊢ (¬ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴𝐹𝐵) = ∅) |
| 4 | 3 | eleq1d 2845 | . . 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 2145 ∅c0 4279 × cxp 5653 dom cdm 5655 (class class class)co 7413 |
| 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 2147 ax-9 2155 ax-ext 2732 ax-sep 5251 ax-nul 5263 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-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-xp 5661 df-dm 5665 df-iota 6489 df-fv 6541 df-ov 7416 |
| This theorem is used by: ndmovass 7602 ndmovdistr 7603 ndmovord 7604 ndmovordi 7605 caovmo 7651 brecop2 8811 eceqoveq 8822 addcanpi 10908 mulcanpi 10909 ordpipq 10951 recmulnq 10973 recclnq 10975 ltexnq 10984 nsmallnq 10986 ltbtwnnq 10987 prlem934 11042 ltaddpr 11043 ltaddpr2 11044 ltexprlem2 11046 ltexprlem3 11047 ltexprlem4 11048 ltexprlem6 11050 ltexprlem7 11051 addcanpr 11055 prlem936 11056 mappsrpr 11117 |
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