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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 7013 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
2 | fvex 6860 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
3 | 2 | elsn 4606 | . . 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 286 | 1 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 {csn 4591 ◡ccnv 5637 “ cima 5641 Fn wfn 6496 ‘cfv 6501 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-12 2171 ax-ext 2702 ax-sep 5261 ax-nul 5268 ax-pr 5389 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-ne 2940 df-ral 3061 df-rex 3070 df-rab 3406 df-v 3448 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4288 df-if 4492 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4871 df-br 5111 df-opab 5173 df-id 5536 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-iota 6453 df-fun 6503 df-fn 6504 df-fv 6509 |
This theorem is referenced by: fparlem1 8049 fparlem2 8050 pw2f1olem 9027 recmulnq 10909 dmrecnq 10913 vdwlem1 16864 vdwlem2 16865 vdwlem6 16869 vdwlem8 16871 vdwlem9 16872 vdwlem12 16875 vdwlem13 16876 ramval 16891 ramub1lem1 16909 ghmeqker 19049 efgrelexlemb 19546 efgredeu 19548 psgnevpmb 21028 qtopeu 23104 itg1addlem1 25093 i1faddlem 25094 i1fmullem 25095 i1fmulclem 25104 i1fres 25107 itg10a 25112 itg1ge0a 25113 itg1climres 25116 mbfi1fseqlem4 25120 ply1remlem 25564 ply1rem 25565 fta1glem1 25567 fta1glem2 25568 fta1g 25569 fta1blem 25570 plyco0 25590 ofmulrt 25679 plyremlem 25701 plyrem 25702 fta1lem 25704 fta1 25705 vieta1lem1 25707 vieta1lem2 25708 vieta1 25709 plyexmo 25710 elaa 25713 aannenlem1 25725 aalioulem2 25730 pilem1 25847 efif1olem3 25937 efif1olem4 25938 efifo 25940 eff1olem 25941 basellem4 26470 lgsqrlem2 26732 lgsqrlem3 26733 rpvmasum2 26897 dirith 26914 foresf1o 31495 ofpreima 31648 fnpreimac 31654 1stpreimas 31687 s3clhash 31874 pwrssmgc 31930 cycpmconjslem2 32074 cyc3conja 32076 ghmquskerlem1 32269 ghmqusker 32272 dimkerim 32409 elirng 32447 irngss 32448 irngnzply1 32452 locfinreflem 32510 qqhre 32690 indpi1 32708 indpreima 32713 sibfof 33029 cvmliftlem6 33971 cvmliftlem7 33972 cvmliftlem8 33973 cvmliftlem9 33974 taupilem3 35863 itg2addnclem 36202 itg2addnclem2 36203 pw2f1o2val2 41422 dnnumch3 41432 proot1mul 41584 proot1hash 41585 proot1ex 41586 wessf1ornlem 43525 preimafvsnel 45691 uniimaprimaeqfv 45694 elsetpreimafvbi 45703 |
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