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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 7088 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6929 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4599 | . . 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 1570 ∈ wcel 2147 {csn 4588 ◡ccnv 5657 “ cima 5661 Fn wfn 6561 ‘cfv 6566 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-iota 6520 df-fun 6568 df-fn 6569 df-fv 6574 |
| This theorem is used by: fparlem1 8160 fparlem2 8161 pw2f1olem 9138 recmulnq 11088 dmrecnq 11092 indpi1 12374 vdwlem1 17203 vdwlem2 17204 vdwlem6 17208 vdwlem8 17210 vdwlem9 17211 vdwlem12 17214 vdwlem13 17215 ramval 17230 ramub1lem1 17248 ghmeqker 19507 ghmqusnsglem1 19545 ghmquskerlem1 19548 ghmqusker 19552 efgrelexlemb 20015 efgredeu 20017 psgnevpmb 21948 qtopeu 24090 itg1addlem1 26068 i1faddlem 26069 i1fmullem 26070 i1fmulclem 26078 i1fres 26081 itg10a 26086 itg1ge0a 26087 itg1climres 26090 mbfi1fseqlem4 26094 ply1remlem 26538 ply1rem 26539 fta1glem1 26541 fta1glem2 26542 fta1g 26543 fta1blem 26544 plyco0 26565 ofmulrt 26655 plyremlem 26680 plyrem 26681 fta1lem 26683 fta1 26684 rnplynfin 26685 plyconz 26686 vieta1lem1 26688 vieta1lem2 26689 vieta1 26690 plyexmo 26691 elaa 26696 aannenlem1 26712 aalioulem2 26717 pilem1 26835 efif1olem3 26929 efif1olem4 26930 efifo 26932 eff1olem 26933 basellem4 27468 lgsqrlem2 27731 lgsqrlem3 27732 rpvmasum2 27896 dirith 27913 foresf1o 33199 ofpreima 33357 fnpreimac 33362 1stpreimas 33396 indpreima 33528 s3clhash 33608 pwrssmgc 33660 cycpmconjslem2 33815 cyc3conja 33817 exsslsb 34340 dimkerim 34370 elirng 34429 irngss 34430 irngnzply1 34434 locfinreflem 34583 qqhre 34763 sibfof 35083 cvmliftlem6 36263 cvmliftlem7 36264 cvmliftlem8 36265 cvmliftlem9 36266 taupilem3 38508 itg2addnclem 38857 itg2addnclem2 38858 pw2f1o2val2 44313 dnnumch3 44320 proot1mul 44457 proot1hash 44458 proot1ex 44459 wessf1ornlem 46473 preimafvsnel 48734 uniimaprimaeqfv 48737 elsetpreimafvbi 48746 imasubc 50598 imassc 50600 imaid 50601 |
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