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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 7003 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6847 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4595 | . . 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 4580 ◡ccnv 5623 “ cima 5627 Fn wfn 6487 ‘cfv 6492 |
| 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 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-fv 6500 |
| This theorem is referenced by: fparlem1 8054 fparlem2 8055 pw2f1olem 9009 recmulnq 10875 dmrecnq 10879 vdwlem1 16909 vdwlem2 16910 vdwlem6 16914 vdwlem8 16916 vdwlem9 16917 vdwlem12 16920 vdwlem13 16921 ramval 16936 ramub1lem1 16954 ghmeqker 19172 ghmqusnsglem1 19209 ghmquskerlem1 19212 ghmqusker 19216 efgrelexlemb 19679 efgredeu 19681 psgnevpmb 21542 qtopeu 23660 itg1addlem1 25649 i1faddlem 25650 i1fmullem 25651 i1fmulclem 25659 i1fres 25662 itg10a 25667 itg1ge0a 25668 itg1climres 25671 mbfi1fseqlem4 25675 ply1remlem 26126 ply1rem 26127 fta1glem1 26129 fta1glem2 26130 fta1g 26131 fta1blem 26132 plyco0 26153 ofmulrt 26245 plyremlem 26268 plyrem 26269 fta1lem 26271 fta1 26272 vieta1lem1 26274 vieta1lem2 26275 vieta1 26276 plyexmo 26277 elaa 26280 aannenlem1 26292 aalioulem2 26297 pilem1 26417 efif1olem3 26509 efif1olem4 26510 efifo 26512 eff1olem 26513 basellem4 27050 lgsqrlem2 27314 lgsqrlem3 27315 rpvmasum2 27479 dirith 27496 foresf1o 32579 ofpreima 32743 fnpreimac 32749 1stpreimas 32785 indpi1 32941 indpreima 32947 s3clhash 33030 pwrssmgc 33082 cycpmconjslem2 33237 cyc3conja 33239 exsslsb 33753 dimkerim 33784 elirng 33843 irngss 33844 irngnzply1 33848 locfinreflem 33997 qqhre 34177 sibfof 34497 cvmliftlem6 35484 cvmliftlem7 35485 cvmliftlem8 35486 cvmliftlem9 35487 taupilem3 37524 itg2addnclem 37872 itg2addnclem2 37873 pw2f1o2val2 43282 dnnumch3 43289 proot1mul 43436 proot1hash 43437 proot1ex 43438 wessf1ornlem 45429 preimafvsnel 47625 uniimaprimaeqfv 47628 elsetpreimafvbi 47637 imasubc 49396 imassc 49398 imaid 49399 |
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