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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 5258 | . 2 ⊢ dom 𝐹 ⊆ 𝐴 |
| 3 | 1 | funmpt2 5390 | . . . 4 ⊢ Fun 𝐹 |
| 4 | funrel 5368 | . . . 4 ⊢ (Fun 𝐹 → Rel 𝐹) | |
| 5 | 3, 4 | ax-mp 5 | . . 3 ⊢ Rel 𝐹 |
| 6 | relelfvdm 5701 | . . 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 3235 | 1 ⊢ (𝐼 ∈ (𝐹‘𝑋) → 𝑋 ∈ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2203 ↦ cmpt 4170 dom cdm 4748 Rel wrel 4753 Fun wfun 5345 ‘cfv 5351 |
| 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 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2814 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fv 5359 |
| This theorem is referenced by: bitsval 12622 divsfval 13530 submrcl 13673 issubg 13879 isnsg 13908 issubrng 14333 issubrg 14355 zrhval 14752 psmetdmdm 15176 psmetf 15177 psmet0 15179 psmettri2 15180 psmetres2 15185 plybss 15585 edgval 16042 wlkmex 16301 wlkreslem 16360 trlsv 16366 isclwwlk 16376 clwwlkbp 16377 clwwlknonmpo 16410 eupthv 16428 trlsegvdegfi 16449 eupth2lem3lem1fi 16450 eupth2lem3lem2fi 16451 eupth2lem3lem6fi 16453 eupth2lem3lem4fi 16455 |
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