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Mirrors > Home > MPE Home > Th. List > cnvexg | Structured version Visualization version GIF version |
Description: The converse of a set is a set. Corollary 6.8(1) of [TakeutiZaring] p. 26. (Contributed by NM, 17-Mar-1998.) |
Ref | Expression |
---|---|
cnvexg | ⊢ (𝐴 ∈ 𝑉 → ◡𝐴 ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relcnv 5952 | . . 3 ⊢ Rel ◡𝐴 | |
2 | relssdmrn 6112 | . . 3 ⊢ (Rel ◡𝐴 → ◡𝐴 ⊆ (dom ◡𝐴 × ran ◡𝐴)) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ ◡𝐴 ⊆ (dom ◡𝐴 × ran ◡𝐴) |
4 | df-rn 5547 | . . . 4 ⊢ ran 𝐴 = dom ◡𝐴 | |
5 | rnexg 7660 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ran 𝐴 ∈ V) | |
6 | 4, 5 | eqeltrrid 2836 | . . 3 ⊢ (𝐴 ∈ 𝑉 → dom ◡𝐴 ∈ V) |
7 | dfdm4 5749 | . . . 4 ⊢ dom 𝐴 = ran ◡𝐴 | |
8 | dmexg 7659 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → dom 𝐴 ∈ V) | |
9 | 7, 8 | eqeltrrid 2836 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ran ◡𝐴 ∈ V) |
10 | 6, 9 | xpexd 7514 | . 2 ⊢ (𝐴 ∈ 𝑉 → (dom ◡𝐴 × ran ◡𝐴) ∈ V) |
11 | ssexg 5201 | . 2 ⊢ ((◡𝐴 ⊆ (dom ◡𝐴 × ran ◡𝐴) ∧ (dom ◡𝐴 × ran ◡𝐴) ∈ V) → ◡𝐴 ∈ V) | |
12 | 3, 10, 11 | sylancr 590 | 1 ⊢ (𝐴 ∈ 𝑉 → ◡𝐴 ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2112 Vcvv 3398 ⊆ wss 3853 × cxp 5534 ◡ccnv 5535 dom cdm 5536 ran crn 5537 Rel wrel 5541 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-op 4534 df-uni 4806 df-br 5040 df-opab 5102 df-xp 5542 df-rel 5543 df-cnv 5544 df-dm 5546 df-rn 5547 |
This theorem is referenced by: cnvex 7681 relcnvexb 7682 cofunex2g 7701 tposexg 7960 cnven 8688 cnvct 8689 fopwdom 8731 domssex2 8784 domssex 8785 cnvfiALT 8936 mapfienlem2 9000 wemapwe 9290 hasheqf1oi 13883 brtrclfvcnv 14532 brcnvtrclfvcnv 14533 relexpcnv 14563 relexpnnrn 14573 relexpaddg 14581 imasle 16982 cnvps 18038 gsumvalx 18102 symginv 18748 tposmap 21308 metustel 23402 metustss 23403 metustfbas 23409 metuel2 23417 psmetutop 23419 restmetu 23422 itg2gt0 24612 nlfnval 29916 fnpreimac 30682 ffsrn 30738 pwrssmgc 30951 tocycfv 31049 elrspunidl 31274 rhmpreimacnlem 31502 eulerpartlemgs2 32013 orvcval 32090 coinfliprv 32115 cossex 36228 cosscnvex 36229 cnvelrels 36299 lkrval 36788 pw2f1o2val 40505 lmhmlnmsplit 40556 cnvcnvintabd 40825 clrellem 40847 relexpaddss 40944 cnvtrclfv 40950 rntrclfvRP 40957 xpexb 41686 sge0f1o 43538 smfco 43951 preimafvelsetpreimafv 44456 fundcmpsurinjlem2 44467 |
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