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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 7054 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6895 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4609 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
| 4 | 3 | anbi2i 634 | . 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 |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 {csn 4594 ◡ccnv 5661 “ cima 5665 Fn wfn 6532 ‘cfv 6537 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-fv 6545 |
| This theorem is referenced by: fparlem1 8106 fparlem2 8107 pw2f1olem 9068 recmulnq 10948 dmrecnq 10952 indpi1 12231 vdwlem1 17040 vdwlem2 17041 vdwlem6 17045 vdwlem8 17047 vdwlem9 17048 vdwlem12 17051 vdwlem13 17052 ramval 17067 ramub1lem1 17085 ghmeqker 19312 ghmqusnsglem1 19349 ghmquskerlem1 19352 ghmqusker 19356 efgrelexlemb 19819 efgredeu 19821 psgnevpmb 21705 qtopeu 23841 itg1addlem1 25819 i1faddlem 25820 i1fmullem 25821 i1fmulclem 25829 i1fres 25832 itg10a 25837 itg1ge0a 25838 itg1climres 25841 mbfi1fseqlem4 25845 ply1remlem 26290 ply1rem 26291 fta1glem1 26293 fta1glem2 26294 fta1g 26295 fta1blem 26296 plyco0 26317 ofmulrt 26408 plyremlem 26433 plyrem 26434 fta1lem 26436 fta1 26437 vieta1lem1 26439 vieta1lem2 26440 vieta1 26441 plyexmo 26442 elaa 26445 aannenlem1 26457 aalioulem2 26462 pilem1 26579 efif1olem3 26674 efif1olem4 26675 efifo 26677 eff1olem 26678 basellem4 27213 lgsqrlem2 27476 lgsqrlem3 27477 rpvmasum2 27641 dirith 27658 foresf1o 32790 ofpreima 32950 fnpreimac 32955 1stpreimas 32991 indpreima 33125 s3clhash 33208 pwrssmgc 33260 cycpmconjslem2 33415 cyc3conja 33417 exsslsb 33931 dimkerim 33961 elirng 34020 irngss 34021 irngnzply1 34025 locfinreflem 34174 qqhre 34354 sibfof 34674 cvmliftlem6 35680 cvmliftlem7 35681 cvmliftlem8 35682 cvmliftlem9 35683 taupilem3 37850 itg2addnclem 38209 itg2addnclem2 38210 pw2f1o2val2 43658 dnnumch3 43665 proot1mul 43812 proot1hash 43813 proot1ex 43814 wessf1ornlem 45794 preimafvsnel 48016 uniimaprimaeqfv 48019 elsetpreimafvbi 48028 imasubc 49813 imassc 49815 imaid 49816 |
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