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| Mirrors > Home > ILE Home > Th. List > mptrcl | GIF version | ||
| Description: Reverse closure for a mapping: If the function value of a mapping has a member, the argument belongs to the base class of the mapping. (Contributed by AV, 4-Apr-2020.) (Revised by Jim Kingdon, 27-Mar-2023.) |
| Ref | Expression |
|---|---|
| fvmpt2.1 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) |
| Ref | Expression |
|---|---|
| mptrcl | ⊢ (𝐼 ∈ (𝐹‘𝑋) → 𝑋 ∈ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvmpt2.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 2 | 1 | dmmptss 5231 | . 2 ⊢ dom 𝐹 ⊆ 𝐴 |
| 3 | 1 | funmpt2 5363 | . . . 4 ⊢ Fun 𝐹 |
| 4 | funrel 5341 | . . . 4 ⊢ (Fun 𝐹 → Rel 𝐹) | |
| 5 | 3, 4 | ax-mp 5 | . . 3 ⊢ Rel 𝐹 |
| 6 | relelfvdm 5667 | . . 3 ⊢ ((Rel 𝐹 ∧ 𝐼 ∈ (𝐹‘𝑋)) → 𝑋 ∈ dom 𝐹) | |
| 7 | 5, 6 | mpan 424 | . 2 ⊢ (𝐼 ∈ (𝐹‘𝑋) → 𝑋 ∈ dom 𝐹) |
| 8 | 2, 7 | sselid 3223 | 1 ⊢ (𝐼 ∈ (𝐹‘𝑋) → 𝑋 ∈ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 ↦ cmpt 4148 dom cdm 4723 Rel wrel 4728 Fun wfun 5318 ‘cfv 5324 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-mpt 4150 df-id 4388 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 df-iota 5284 df-fun 5326 df-fv 5332 |
| This theorem is referenced by: bitsval 12497 divsfval 13404 submrcl 13547 issubg 13753 isnsg 13782 issubrng 14206 issubrg 14228 zrhval 14624 psmetdmdm 15041 psmetf 15042 psmet0 15044 psmettri2 15045 psmetres2 15050 plybss 15450 edgval 15904 wlkmex 16130 wlkreslem 16187 trlsv 16193 isclwwlk 16203 clwwlkbp 16204 clwwlknonmpo 16237 eupthv 16255 |
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