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| Mirrors > Home > MPE Home > Th. List > fniniseg | Structured version Visualization version GIF version | ||
| Description: Membership in the preimage of a singleton, under a function. (Contributed by Mario Carneiro, 12-May-2014.) (Proof shortened by Mario Carneiro , 28-Apr-2015.) |
| Ref | Expression |
|---|---|
| fniniseg | ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elpreima 7012 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6855 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4597 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
| 4 | 3 | anbi2i 624 | . 2 ⊢ ((𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵)) |
| 5 | 1, 4 | bitrdi 287 | 1 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 {csn 4582 ◡ccnv 5631 “ cima 5635 Fn wfn 6495 ‘cfv 6500 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-fv 6508 |
| This theorem is referenced by: fparlem1 8064 fparlem2 8065 pw2f1olem 9021 recmulnq 10887 dmrecnq 10891 vdwlem1 16921 vdwlem2 16922 vdwlem6 16926 vdwlem8 16928 vdwlem9 16929 vdwlem12 16932 vdwlem13 16933 ramval 16948 ramub1lem1 16966 ghmeqker 19184 ghmqusnsglem1 19221 ghmquskerlem1 19224 ghmqusker 19228 efgrelexlemb 19691 efgredeu 19693 psgnevpmb 21554 qtopeu 23672 itg1addlem1 25661 i1faddlem 25662 i1fmullem 25663 i1fmulclem 25671 i1fres 25674 itg10a 25679 itg1ge0a 25680 itg1climres 25683 mbfi1fseqlem4 25687 ply1remlem 26138 ply1rem 26139 fta1glem1 26141 fta1glem2 26142 fta1g 26143 fta1blem 26144 plyco0 26165 ofmulrt 26257 plyremlem 26280 plyrem 26281 fta1lem 26283 fta1 26284 vieta1lem1 26286 vieta1lem2 26287 vieta1 26288 plyexmo 26289 elaa 26292 aannenlem1 26304 aalioulem2 26309 pilem1 26429 efif1olem3 26521 efif1olem4 26522 efifo 26524 eff1olem 26525 basellem4 27062 lgsqrlem2 27326 lgsqrlem3 27327 rpvmasum2 27491 dirith 27508 foresf1o 32591 ofpreima 32755 fnpreimac 32760 1stpreimas 32796 indpi1 32952 indpreima 32958 s3clhash 33041 pwrssmgc 33093 cycpmconjslem2 33249 cyc3conja 33251 exsslsb 33774 dimkerim 33805 elirng 33864 irngss 33865 irngnzply1 33869 locfinreflem 34018 qqhre 34198 sibfof 34518 cvmliftlem6 35506 cvmliftlem7 35507 cvmliftlem8 35508 cvmliftlem9 35509 taupilem3 37574 itg2addnclem 37922 itg2addnclem2 37923 pw2f1o2val2 43397 dnnumch3 43404 proot1mul 43551 proot1hash 43552 proot1ex 43553 wessf1ornlem 45544 preimafvsnel 47739 uniimaprimaeqfv 47742 elsetpreimafvbi 47751 imasubc 49510 imassc 49512 imaid 49513 |
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