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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 6999 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6840 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4570 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
| 4 | 3 | anbi2i 629 | . 2 ⊢ ((𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵)) |
| 5 | 1, 4 | bitrdi 288 | 1 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 = wceq 1547 ∈ wcel 2119 {csn 4555 ◡ccnv 5617 “ cima 5621 Fn wfn 6480 ‘cfv 6485 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pr 5362 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-fv 6493 |
| This theorem is referenced by: fparlem1 8051 fparlem2 8052 pw2f1olem 9009 recmulnq 10878 dmrecnq 10882 indpi1 12164 vdwlem1 16943 vdwlem2 16944 vdwlem6 16948 vdwlem8 16950 vdwlem9 16951 vdwlem12 16954 vdwlem13 16955 ramval 16970 ramub1lem1 16988 ghmeqker 19209 ghmqusnsglem1 19246 ghmquskerlem1 19249 ghmqusker 19253 efgrelexlemb 19716 efgredeu 19718 psgnevpmb 21562 qtopeu 23699 itg1addlem1 25677 i1faddlem 25678 i1fmullem 25679 i1fmulclem 25687 i1fres 25690 itg10a 25695 itg1ge0a 25696 itg1climres 25699 mbfi1fseqlem4 25703 ply1remlem 26148 ply1rem 26149 fta1glem1 26151 fta1glem2 26152 fta1g 26153 fta1blem 26154 plyco0 26175 ofmulrt 26266 plyremlem 26288 plyrem 26289 fta1lem 26291 fta1 26292 vieta1lem1 26294 vieta1lem2 26295 vieta1 26296 plyexmo 26297 elaa 26300 aannenlem1 26312 aalioulem2 26317 pilem1 26434 efif1olem3 26526 efif1olem4 26527 efifo 26529 eff1olem 26530 basellem4 27065 lgsqrlem2 27328 lgsqrlem3 27329 rpvmasum2 27493 dirith 27510 foresf1o 32592 ofpreima 32757 fnpreimac 32762 1stpreimas 32798 indpreima 32944 s3clhash 33027 pwrssmgc 33079 cycpmconjslem2 33236 cyc3conja 33238 exsslsb 33781 dimkerim 33811 elirng 33870 irngss 33871 irngnzply1 33875 locfinreflem 34024 qqhre 34204 sibfof 34524 cvmliftlem6 35518 cvmliftlem7 35519 cvmliftlem8 35520 cvmliftlem9 35521 taupilem3 37679 itg2addnclem 38038 itg2addnclem2 38039 pw2f1o2val2 43485 dnnumch3 43492 proot1mul 43639 proot1hash 43640 proot1ex 43641 wessf1ornlem 45632 preimafvsnel 47854 uniimaprimaeqfv 47857 elsetpreimafvbi 47866 imasubc 49641 imassc 49643 imaid 49644 |
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