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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 7055 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6896 | . . . 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 2145 {csn 4584 ◡ccnv 5650 “ cima 5654 Fn wfn 6532 ‘cfv 6537 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| 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 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6493 df-fun 6539 df-fn 6540 df-fv 6545 |
| This theorem is used by: fparlem1 8121 fparlem2 8122 pw2f1olem 9093 recmulnq 11042 dmrecnq 11046 indpi1 12327 vdwlem1 17152 vdwlem2 17153 vdwlem6 17157 vdwlem8 17159 vdwlem9 17160 vdwlem12 17163 vdwlem13 17164 ramval 17179 ramub1lem1 17197 ghmeqker 19450 ghmqusnsglem1 19487 ghmquskerlem1 19490 ghmqusker 19494 efgrelexlemb 19957 efgredeu 19959 psgnevpmb 21886 qtopeu 24028 itg1addlem1 26006 i1faddlem 26007 i1fmullem 26008 i1fmulclem 26016 i1fres 26019 itg10a 26024 itg1ge0a 26025 itg1climres 26028 mbfi1fseqlem4 26032 ply1remlem 26476 ply1rem 26477 fta1glem1 26479 fta1glem2 26480 fta1g 26481 fta1blem 26482 plyco0 26503 ofmulrt 26593 plyremlem 26618 plyrem 26619 fta1lem 26621 fta1 26622 rnplynfin 26623 plyconz 26624 vieta1lem1 26626 vieta1lem2 26627 vieta1 26628 plyexmo 26629 elaa 26632 aannenlem1 26648 aalioulem2 26653 pilem1 26771 efif1olem3 26865 efif1olem4 26866 efifo 26868 eff1olem 26869 basellem4 27404 lgsqrlem2 27667 lgsqrlem3 27668 rpvmasum2 27832 dirith 27849 foresf1o 33093 ofpreima 33252 fnpreimac 33257 1stpreimas 33292 indpreima 33425 s3clhash 33505 pwrssmgc 33554 cycpmconjslem2 33709 cyc3conja 33711 exsslsb 34222 dimkerim 34252 elirng 34311 irngss 34312 irngnzply1 34316 locfinreflem 34465 qqhre 34645 sibfof 34965 cvmliftlem6 36034 cvmliftlem7 36035 cvmliftlem8 36036 cvmliftlem9 36037 taupilem3 38220 itg2addnclem 38569 itg2addnclem2 38570 pw2f1o2val2 44026 dnnumch3 44033 proot1mul 44180 proot1hash 44181 proot1ex 44182 wessf1ornlem 46169 preimafvsnel 48430 uniimaprimaeqfv 48433 elsetpreimafvbi 48442 imasubc 50228 imassc 50230 imaid 50231 |
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