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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 7001 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6845 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4593 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
| 4 | 3 | anbi2i 623 | . 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 1541 ∈ wcel 2113 {csn 4578 ◡ccnv 5621 “ cima 5625 Fn wfn 6485 ‘cfv 6490 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-fv 6498 |
| This theorem is referenced by: fparlem1 8052 fparlem2 8053 pw2f1olem 9007 recmulnq 10873 dmrecnq 10877 vdwlem1 16907 vdwlem2 16908 vdwlem6 16912 vdwlem8 16914 vdwlem9 16915 vdwlem12 16918 vdwlem13 16919 ramval 16934 ramub1lem1 16952 ghmeqker 19170 ghmqusnsglem1 19207 ghmquskerlem1 19210 ghmqusker 19214 efgrelexlemb 19677 efgredeu 19679 psgnevpmb 21540 qtopeu 23658 itg1addlem1 25647 i1faddlem 25648 i1fmullem 25649 i1fmulclem 25657 i1fres 25660 itg10a 25665 itg1ge0a 25666 itg1climres 25669 mbfi1fseqlem4 25673 ply1remlem 26124 ply1rem 26125 fta1glem1 26127 fta1glem2 26128 fta1g 26129 fta1blem 26130 plyco0 26151 ofmulrt 26243 plyremlem 26266 plyrem 26267 fta1lem 26269 fta1 26270 vieta1lem1 26272 vieta1lem2 26273 vieta1 26274 plyexmo 26275 elaa 26278 aannenlem1 26290 aalioulem2 26295 pilem1 26415 efif1olem3 26507 efif1olem4 26508 efifo 26510 eff1olem 26511 basellem4 27048 lgsqrlem2 27312 lgsqrlem3 27313 rpvmasum2 27477 dirith 27494 foresf1o 32528 ofpreima 32692 fnpreimac 32698 1stpreimas 32734 indpi1 32890 indpreima 32896 s3clhash 32979 pwrssmgc 33031 cycpmconjslem2 33186 cyc3conja 33188 exsslsb 33702 dimkerim 33733 elirng 33792 irngss 33793 irngnzply1 33797 locfinreflem 33946 qqhre 34126 sibfof 34446 cvmliftlem6 35433 cvmliftlem7 35434 cvmliftlem8 35435 cvmliftlem9 35436 taupilem3 37463 itg2addnclem 37811 itg2addnclem2 37812 pw2f1o2val2 43224 dnnumch3 43231 proot1mul 43378 proot1hash 43379 proot1ex 43380 wessf1ornlem 45371 preimafvsnel 47567 uniimaprimaeqfv 47570 elsetpreimafvbi 47579 imasubc 49338 imassc 49340 imaid 49341 |
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