| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 7004 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6847 | . . . 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 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 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 5231 ax-nul 5241 ax-pr 5370 |
| 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 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 8055 fparlem2 8056 pw2f1olem 9012 recmulnq 10878 dmrecnq 10882 indpi1 12164 vdwlem1 16943 vdwlem2 16944 vdwlem6 16948 vdwlem8 16950 vdwlem9 16951 vdwlem12 16954 vdwlem13 16955 ramval 16970 ramub1lem1 16988 ghmeqker 19209 ghmqusnsglem1 19246 ghmquskerlem1 19249 ghmqusker 19253 efgrelexlemb 19716 efgredeu 19718 psgnevpmb 21577 qtopeu 23691 itg1addlem1 25669 i1faddlem 25670 i1fmullem 25671 i1fmulclem 25679 i1fres 25682 itg10a 25687 itg1ge0a 25688 itg1climres 25691 mbfi1fseqlem4 25695 ply1remlem 26140 ply1rem 26141 fta1glem1 26143 fta1glem2 26144 fta1g 26145 fta1blem 26146 plyco0 26167 ofmulrt 26258 plyremlem 26281 plyrem 26282 fta1lem 26284 fta1 26285 vieta1lem1 26287 vieta1lem2 26288 vieta1 26289 plyexmo 26290 elaa 26293 aannenlem1 26305 aalioulem2 26310 pilem1 26429 efif1olem3 26521 efif1olem4 26522 efifo 26524 eff1olem 26525 basellem4 27061 lgsqrlem2 27324 lgsqrlem3 27325 rpvmasum2 27489 dirith 27506 foresf1o 32589 ofpreima 32753 fnpreimac 32758 1stpreimas 32794 indpreima 32940 s3clhash 33023 pwrssmgc 33075 cycpmconjslem2 33231 cyc3conja 33233 exsslsb 33756 dimkerim 33787 elirng 33846 irngss 33847 irngnzply1 33851 locfinreflem 34000 qqhre 34180 sibfof 34500 cvmliftlem6 35488 cvmliftlem7 35489 cvmliftlem8 35490 cvmliftlem9 35491 taupilem3 37649 itg2addnclem 38006 itg2addnclem2 38007 pw2f1o2val2 43486 dnnumch3 43493 proot1mul 43640 proot1hash 43641 proot1ex 43642 wessf1ornlem 45633 preimafvsnel 47851 uniimaprimaeqfv 47854 elsetpreimafvbi 47863 imasubc 49638 imassc 49640 imaid 49641 |
| Copyright terms: Public domain | W3C validator |