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| Mirrors > Home > ILE Home > Th. List > cnvct | GIF version | ||
| Description: If a set is dominated by ω, so is its converse. (Contributed by Thierry Arnoux, 29-Dec-2016.) |
| Ref | Expression |
|---|---|
| cnvct | ⊢ (𝐴 ≼ ω → ◡𝐴 ≼ ω) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 5168 | . . . 4 ⊢ Rel ◡𝐴 | |
| 2 | ctex 7041 | . . . . 5 ⊢ (𝐴 ≼ ω → 𝐴 ∈ V) | |
| 3 | cnvexg 5328 | . . . . 5 ⊢ (𝐴 ∈ V → ◡𝐴 ∈ V) | |
| 4 | 2, 3 | syl 14 | . . . 4 ⊢ (𝐴 ≼ ω → ◡𝐴 ∈ V) |
| 5 | cnven 7100 | . . . 4 ⊢ ((Rel ◡𝐴 ∧ ◡𝐴 ∈ V) → ◡𝐴 ≈ ◡◡𝐴) | |
| 6 | 1, 4, 5 | sylancr 418 | . . 3 ⊢ (𝐴 ≼ ω → ◡𝐴 ≈ ◡◡𝐴) |
| 7 | cnvcnvss 5245 | . . . 4 ⊢ ◡◡𝐴 ⊆ 𝐴 | |
| 8 | ssdomg 7069 | . . . 4 ⊢ (𝐴 ∈ V → (◡◡𝐴 ⊆ 𝐴 → ◡◡𝐴 ≼ 𝐴)) | |
| 9 | 2, 7, 8 | mpisyl 1496 | . . 3 ⊢ (𝐴 ≼ ω → ◡◡𝐴 ≼ 𝐴) |
| 10 | endomtr 7081 | . . 3 ⊢ ((◡𝐴 ≈ ◡◡𝐴 ∧ ◡◡𝐴 ≼ 𝐴) → ◡𝐴 ≼ 𝐴) | |
| 11 | 6, 9, 10 | syl2anc 415 | . 2 ⊢ (𝐴 ≼ ω → ◡𝐴 ≼ 𝐴) |
| 12 | domtr 7076 | . 2 ⊢ ((◡𝐴 ≼ 𝐴 ∧ 𝐴 ≼ ω) → ◡𝐴 ≼ ω) | |
| 13 | 11, 12 | mpancom 426 | 1 ⊢ (𝐴 ≼ ω → ◡𝐴 ≼ ω) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 Vcvv 2821 ⊆ wss 3220 class class class wbr 4131 ωcom 4739 ◡ccnv 4775 Rel wrel 4781 ≈ cen 7024 ≼ cdom 7025 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-sbc 3052 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4132 df-opab 4194 df-mpt 4195 df-id 4440 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 df-f1 5385 df-fo 5386 df-f1o 5387 df-fv 5388 df-1st 6378 df-2nd 6379 df-en 7027 df-dom 7028 |
| This theorem is used by: (None) |
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