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Mirrors > Home > ILE Home > Th. List > fmpt | GIF version |
Description: Functionality of the mapping operation. (Contributed by Mario Carneiro, 26-Jul-2013.) (Revised by Mario Carneiro, 31-Aug-2015.) |
Ref | Expression |
---|---|
fmpt.1 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐶) |
Ref | Expression |
---|---|
fmpt | ⊢ (∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 ↔ 𝐹:𝐴⟶𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fmpt.1 | . . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐶) | |
2 | 1 | fnmpt 5308 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 → 𝐹 Fn 𝐴) |
3 | 1 | rnmpt 4846 | . . . 4 ⊢ ran 𝐹 = {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐶} |
4 | r19.29 2601 | . . . . . . 7 ⊢ ((∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 ∧ ∃𝑥 ∈ 𝐴 𝑦 = 𝐶) → ∃𝑥 ∈ 𝐴 (𝐶 ∈ 𝐵 ∧ 𝑦 = 𝐶)) | |
5 | eleq1 2227 | . . . . . . . . 9 ⊢ (𝑦 = 𝐶 → (𝑦 ∈ 𝐵 ↔ 𝐶 ∈ 𝐵)) | |
6 | 5 | biimparc 297 | . . . . . . . 8 ⊢ ((𝐶 ∈ 𝐵 ∧ 𝑦 = 𝐶) → 𝑦 ∈ 𝐵) |
7 | 6 | rexlimivw 2577 | . . . . . . 7 ⊢ (∃𝑥 ∈ 𝐴 (𝐶 ∈ 𝐵 ∧ 𝑦 = 𝐶) → 𝑦 ∈ 𝐵) |
8 | 4, 7 | syl 14 | . . . . . 6 ⊢ ((∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 ∧ ∃𝑥 ∈ 𝐴 𝑦 = 𝐶) → 𝑦 ∈ 𝐵) |
9 | 8 | ex 114 | . . . . 5 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 → (∃𝑥 ∈ 𝐴 𝑦 = 𝐶 → 𝑦 ∈ 𝐵)) |
10 | 9 | abssdv 3211 | . . . 4 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐶} ⊆ 𝐵) |
11 | 3, 10 | eqsstrid 3183 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 → ran 𝐹 ⊆ 𝐵) |
12 | df-f 5186 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
13 | 2, 11, 12 | sylanbrc 414 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 → 𝐹:𝐴⟶𝐵) |
14 | fimacnv 5608 | . . . 4 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) | |
15 | 1 | mptpreima 5091 | . . . 4 ⊢ (◡𝐹 “ 𝐵) = {𝑥 ∈ 𝐴 ∣ 𝐶 ∈ 𝐵} |
16 | 14, 15 | eqtr3di 2212 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → 𝐴 = {𝑥 ∈ 𝐴 ∣ 𝐶 ∈ 𝐵}) |
17 | rabid2 2640 | . . 3 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝐶 ∈ 𝐵} ↔ ∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵) | |
18 | 16, 17 | sylib 121 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → ∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵) |
19 | 13, 18 | impbii 125 | 1 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ∈ 𝐵 ↔ 𝐹:𝐴⟶𝐵) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 ↔ wb 104 = wceq 1342 ∈ wcel 2135 {cab 2150 ∀wral 2442 ∃wrex 2443 {crab 2446 ⊆ wss 3111 ↦ cmpt 4037 ◡ccnv 4597 ran crn 4599 “ cima 4601 Fn wfn 5177 ⟶wf 5178 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ral 2447 df-rex 2448 df-rab 2451 df-v 2723 df-sbc 2947 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-br 3977 df-opab 4038 df-mpt 4039 df-id 4265 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-rn 4609 df-res 4610 df-ima 4611 df-iota 5147 df-fun 5184 df-fn 5185 df-f 5186 df-fv 5190 |
This theorem is referenced by: f1ompt 5630 fmpti 5631 fvmptelrn 5632 fmptd 5633 fmptdf 5636 rnmptss 5640 f1oresrab 5644 idref 5719 f1mpt 5733 f1stres 6119 f2ndres 6120 fmpox 6160 fmpoco 6175 iunon 6243 mptelixpg 6691 dom2lem 6729 uzf 9460 pcmptcl 12251 upxp 12819 txdis1cn 12825 cnmpt11 12830 cnmpt21 12838 fsumcncntop 13103 cncfmpt1f 13131 mulcncflem 13137 mulcncf 13138 cnmptlimc 13190 sincn 13237 coscn 13238 |
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