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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 5261 | . 2 ⊢ dom 𝐹 ⊆ 𝐴 |
| 3 | 1 | funmpt2 5393 | . . . 4 ⊢ Fun 𝐹 |
| 4 | funrel 5371 | . . . 4 ⊢ (Fun 𝐹 → Rel 𝐹) | |
| 5 | 3, 4 | ax-mp 5 | . . 3 ⊢ Rel 𝐹 |
| 6 | relelfvdm 5704 | . . 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 3238 | 1 ⊢ (𝐼 ∈ (𝐹‘𝑋) → 𝑋 ∈ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2205 ↦ cmpt 4173 dom cdm 4751 Rel wrel 4756 Fun wfun 5348 ‘cfv 5354 |
| 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 4230 ax-pow 4289 ax-pr 4324 |
| 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 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-br 4112 df-opab 4174 df-mpt 4175 df-id 4416 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-rn 4762 df-res 4763 df-ima 4764 df-iota 5314 df-fun 5356 df-fv 5362 |
| This theorem is referenced by: bitsval 12637 divsfval 13562 submrcl 13705 issubg 13911 isnsg 13940 issubrng 14367 issubrg 14389 zrhval 14814 psmetdmdm 15238 psmetf 15239 psmet0 15241 psmettri2 15242 psmetres2 15247 plybss 15647 edgval 16104 wlkmex 16363 wlkreslem 16422 trlsv 16428 isclwwlk 16438 clwwlkbp 16439 clwwlknonmpo 16472 eupthv 16490 trlsegvdegfi 16511 eupth2lem3lem1fi 16512 eupth2lem3lem2fi 16513 eupth2lem3lem6fi 16515 eupth2lem3lem4fi 16517 |
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