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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 7005 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6848 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4583 | . . 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 4568 ◡ccnv 5624 “ cima 5628 Fn wfn 6488 ‘cfv 6493 |
| 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 2709 ax-sep 5232 ax-nul 5242 ax-pr 5371 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-fv 6501 |
| This theorem is referenced by: fparlem1 8056 fparlem2 8057 pw2f1olem 9013 recmulnq 10881 dmrecnq 10885 indpi1 12167 vdwlem1 16946 vdwlem2 16947 vdwlem6 16951 vdwlem8 16953 vdwlem9 16954 vdwlem12 16957 vdwlem13 16958 ramval 16973 ramub1lem1 16991 ghmeqker 19212 ghmqusnsglem1 19249 ghmquskerlem1 19252 ghmqusker 19256 efgrelexlemb 19719 efgredeu 19721 psgnevpmb 21580 qtopeu 23694 itg1addlem1 25672 i1faddlem 25673 i1fmullem 25674 i1fmulclem 25682 i1fres 25685 itg10a 25690 itg1ge0a 25691 itg1climres 25694 mbfi1fseqlem4 25698 ply1remlem 26143 ply1rem 26144 fta1glem1 26146 fta1glem2 26147 fta1g 26148 fta1blem 26149 plyco0 26170 ofmulrt 26261 plyremlem 26284 plyrem 26285 fta1lem 26287 fta1 26288 vieta1lem1 26290 vieta1lem2 26291 vieta1 26292 plyexmo 26293 elaa 26296 aannenlem1 26308 aalioulem2 26313 pilem1 26432 efif1olem3 26524 efif1olem4 26525 efifo 26527 eff1olem 26528 basellem4 27064 lgsqrlem2 27327 lgsqrlem3 27328 rpvmasum2 27492 dirith 27509 foresf1o 32592 ofpreima 32756 fnpreimac 32761 1stpreimas 32797 indpreima 32943 s3clhash 33026 pwrssmgc 33078 cycpmconjslem2 33234 cyc3conja 33236 exsslsb 33759 dimkerim 33790 elirng 33849 irngss 33850 irngnzply1 33854 locfinreflem 34003 qqhre 34183 sibfof 34503 cvmliftlem6 35491 cvmliftlem7 35492 cvmliftlem8 35493 cvmliftlem9 35494 taupilem3 37652 itg2addnclem 38009 itg2addnclem2 38010 pw2f1o2val2 43489 dnnumch3 43496 proot1mul 43643 proot1hash 43644 proot1ex 43645 wessf1ornlem 45636 preimafvsnel 47854 uniimaprimaeqfv 47857 elsetpreimafvbi 47866 imasubc 49641 imassc 49643 imaid 49644 |
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