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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 7010 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6853 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4582 | . . 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 4567 ◡ccnv 5630 “ cima 5634 Fn wfn 6493 ‘cfv 6498 |
| 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 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-fv 6506 |
| This theorem is referenced by: fparlem1 8062 fparlem2 8063 pw2f1olem 9019 recmulnq 10887 dmrecnq 10891 indpi1 12173 vdwlem1 16952 vdwlem2 16953 vdwlem6 16957 vdwlem8 16959 vdwlem9 16960 vdwlem12 16963 vdwlem13 16964 ramval 16979 ramub1lem1 16997 ghmeqker 19218 ghmqusnsglem1 19255 ghmquskerlem1 19258 ghmqusker 19262 efgrelexlemb 19725 efgredeu 19727 psgnevpmb 21567 qtopeu 23681 itg1addlem1 25659 i1faddlem 25660 i1fmullem 25661 i1fmulclem 25669 i1fres 25672 itg10a 25677 itg1ge0a 25678 itg1climres 25681 mbfi1fseqlem4 25685 ply1remlem 26130 ply1rem 26131 fta1glem1 26133 fta1glem2 26134 fta1g 26135 fta1blem 26136 plyco0 26157 ofmulrt 26248 plyremlem 26270 plyrem 26271 fta1lem 26273 fta1 26274 vieta1lem1 26276 vieta1lem2 26277 vieta1 26278 plyexmo 26279 elaa 26282 aannenlem1 26294 aalioulem2 26299 pilem1 26416 efif1olem3 26508 efif1olem4 26509 efifo 26511 eff1olem 26512 basellem4 27047 lgsqrlem2 27310 lgsqrlem3 27311 rpvmasum2 27475 dirith 27492 foresf1o 32574 ofpreima 32738 fnpreimac 32743 1stpreimas 32779 indpreima 32925 s3clhash 33008 pwrssmgc 33060 cycpmconjslem2 33216 cyc3conja 33218 exsslsb 33741 dimkerim 33771 elirng 33830 irngss 33831 irngnzply1 33835 locfinreflem 33984 qqhre 34164 sibfof 34484 cvmliftlem6 35472 cvmliftlem7 35473 cvmliftlem8 35474 cvmliftlem9 35475 taupilem3 37633 itg2addnclem 37992 itg2addnclem2 37993 pw2f1o2val2 43468 dnnumch3 43475 proot1mul 43622 proot1hash 43623 proot1ex 43624 wessf1ornlem 45615 preimafvsnel 47839 uniimaprimaeqfv 47842 elsetpreimafvbi 47851 imasubc 49626 imassc 49628 imaid 49629 |
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