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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 7062 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6903 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4595 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
| 4 | 3 | anbi2i 635 | . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1569 ∈ wcel 2144 {csn 4584 ◡ccnv 5650 “ cima 5654 Fn wfn 6538 ‘cfv 6543 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6497 df-fun 6545 df-fn 6546 df-fv 6551 |
| This theorem is used by: fparlem1 8129 fparlem2 8130 pw2f1olem 9107 recmulnq 11056 dmrecnq 11060 indpi1 12341 vdwlem1 17168 vdwlem2 17169 vdwlem6 17173 vdwlem8 17175 vdwlem9 17176 vdwlem12 17179 vdwlem13 17180 ramval 17195 ramub1lem1 17213 ghmeqker 19466 ghmqusnsglem1 19503 ghmquskerlem1 19506 ghmqusker 19510 efgrelexlemb 19973 efgredeu 19975 psgnevpmb 21902 qtopeu 24044 itg1addlem1 26022 i1faddlem 26023 i1fmullem 26024 i1fmulclem 26032 i1fres 26035 itg10a 26040 itg1ge0a 26041 itg1climres 26044 mbfi1fseqlem4 26048 ply1remlem 26492 ply1rem 26493 fta1glem1 26495 fta1glem2 26496 fta1g 26497 fta1blem 26498 plyco0 26519 ofmulrt 26609 plyremlem 26634 plyrem 26635 fta1lem 26637 fta1 26638 rnplynfin 26639 plyconz 26640 vieta1lem1 26642 vieta1lem2 26643 vieta1 26644 plyexmo 26645 elaa 26648 aannenlem1 26664 aalioulem2 26669 pilem1 26787 efif1olem3 26881 efif1olem4 26882 efifo 26884 eff1olem 26885 basellem4 27420 lgsqrlem2 27683 lgsqrlem3 27684 rpvmasum2 27848 dirith 27865 foresf1o 33151 ofpreima 33310 fnpreimac 33315 1stpreimas 33350 indpreima 33482 s3clhash 33562 pwrssmgc 33611 cycpmconjslem2 33766 cyc3conja 33768 exsslsb 34279 dimkerim 34309 elirng 34368 irngss 34369 irngnzply1 34373 locfinreflem 34522 qqhre 34702 sibfof 35022 cvmliftlem6 36145 cvmliftlem7 36146 cvmliftlem8 36147 cvmliftlem9 36148 taupilem3 38349 itg2addnclem 38698 itg2addnclem2 38699 pw2f1o2val2 44156 dnnumch3 44163 proot1mul 44305 proot1hash 44306 proot1ex 44307 wessf1ornlem 46308 preimafvsnel 48569 uniimaprimaeqfv 48572 elsetpreimafvbi 48581 imasubc 50375 imassc 50377 imaid 50378 |
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