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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 7053 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6894 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4604 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
| 4 | 3 | anbi2i 634 | . 2 ⊢ ((𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵)) |
| 5 | 1, 4 | bitrdi 290 | 1 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 {csn 4589 ◡ccnv 5660 “ cima 5664 Fn wfn 6531 ‘cfv 6536 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-fv 6544 |
| This theorem is referenced by: fparlem1 8103 fparlem2 8104 pw2f1olem 9065 recmulnq 10944 dmrecnq 10948 indpi1 12227 vdwlem1 17036 vdwlem2 17037 vdwlem6 17041 vdwlem8 17043 vdwlem9 17044 vdwlem12 17047 vdwlem13 17048 ramval 17063 ramub1lem1 17081 ghmeqker 19308 ghmqusnsglem1 19345 ghmquskerlem1 19348 ghmqusker 19352 efgrelexlemb 19815 efgredeu 19817 psgnevpmb 21737 qtopeu 23873 itg1addlem1 25851 i1faddlem 25852 i1fmullem 25853 i1fmulclem 25861 i1fres 25864 itg10a 25869 itg1ge0a 25870 itg1climres 25873 mbfi1fseqlem4 25877 ply1remlem 26322 ply1rem 26323 fta1glem1 26325 fta1glem2 26326 fta1g 26327 fta1blem 26328 plyco0 26349 ofmulrt 26440 plyremlem 26465 plyrem 26466 fta1lem 26468 fta1 26469 vieta1lem1 26471 vieta1lem2 26472 vieta1 26473 plyexmo 26474 elaa 26477 aannenlem1 26491 aalioulem2 26496 pilem1 26614 efif1olem3 26709 efif1olem4 26710 efifo 26712 eff1olem 26713 basellem4 27248 lgsqrlem2 27511 lgsqrlem3 27512 rpvmasum2 27676 dirith 27693 foresf1o 32850 ofpreima 33010 fnpreimac 33015 1stpreimas 33051 indpreima 33185 s3clhash 33268 pwrssmgc 33320 cycpmconjslem2 33475 cyc3conja 33477 exsslsb 33987 dimkerim 34017 elirng 34076 irngss 34077 irngnzply1 34081 locfinreflem 34230 qqhre 34410 sibfof 34730 cvmliftlem6 35782 cvmliftlem7 35783 cvmliftlem8 35784 cvmliftlem9 35785 taupilem3 37963 itg2addnclem 38322 itg2addnclem2 38323 pw2f1o2val2 43767 dnnumch3 43774 proot1mul 43921 proot1hash 43922 proot1ex 43923 wessf1ornlem 45903 preimafvsnel 48128 uniimaprimaeqfv 48131 elsetpreimafvbi 48140 imasubc 49929 imassc 49931 imaid 49932 |
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