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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 5264 | . 2 ⊢ dom 𝐹 ⊆ 𝐴 |
| 3 | 1 | funmpt2 5396 | . . . 4 ⊢ Fun 𝐹 |
| 4 | funrel 5374 | . . . 4 ⊢ (Fun 𝐹 → Rel 𝐹) | |
| 5 | 3, 4 | ax-mp 5 | . . 3 ⊢ Rel 𝐹 |
| 6 | relelfvdm 5707 | . . 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 3240 | 1 ⊢ (𝐼 ∈ (𝐹‘𝑋) → 𝑋 ∈ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2205 ↦ cmpt 4176 dom cdm 4754 Rel wrel 4759 Fun wfun 5351 ‘cfv 5357 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-br 4115 df-opab 4177 df-mpt 4178 df-id 4419 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fv 5365 |
| This theorem is referenced by: bitsval 12657 divsfval 13595 submrcl 13729 issubg 13929 isnsg 13958 issubrng 14448 issubrg 14470 zrhval 14894 psmetdmdm 15318 psmetf 15319 psmet0 15321 psmettri2 15322 psmetres2 15327 plybss 15727 edgval 16184 wlkmex 16443 wlkreslem 16502 trlsv 16508 isclwwlk 16518 clwwlkbp 16519 clwwlknonmpo 16552 eupthv 16570 trlsegvdegfi 16591 eupth2lem3lem1fi 16592 eupth2lem3lem2fi 16593 eupth2lem3lem6fi 16595 eupth2lem3lem4fi 16597 |
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