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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 7057 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6898 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4598 | . . 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 1569 ∈ wcel 2144 {csn 4583 ◡ccnv 5649 “ cima 5653 Fn wfn 6533 ‘cfv 6538 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3899 df-un 3901 df-in 3903 df-ss 3914 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6540 df-fn 6541 df-fv 6546 |
| This theorem is used by: fparlem1 8123 fparlem2 8124 pw2f1olem 9100 recmulnq 11049 dmrecnq 11053 indpi1 12334 vdwlem1 17159 vdwlem2 17160 vdwlem6 17164 vdwlem8 17166 vdwlem9 17167 vdwlem12 17170 vdwlem13 17171 ramval 17186 ramub1lem1 17204 ghmeqker 19457 ghmqusnsglem1 19494 ghmquskerlem1 19497 ghmqusker 19501 efgrelexlemb 19964 efgredeu 19966 psgnevpmb 21893 qtopeu 24035 itg1addlem1 26013 i1faddlem 26014 i1fmullem 26015 i1fmulclem 26023 i1fres 26026 itg10a 26031 itg1ge0a 26032 itg1climres 26035 mbfi1fseqlem4 26039 ply1remlem 26483 ply1rem 26484 fta1glem1 26486 fta1glem2 26487 fta1g 26488 fta1blem 26489 plyco0 26510 ofmulrt 26600 plyremlem 26625 plyrem 26626 fta1lem 26628 fta1 26629 rnplynfin 26630 plyconz 26631 vieta1lem1 26633 vieta1lem2 26634 vieta1 26635 plyexmo 26636 elaa 26639 aannenlem1 26655 aalioulem2 26660 pilem1 26778 efif1olem3 26872 efif1olem4 26873 efifo 26875 eff1olem 26876 basellem4 27411 lgsqrlem2 27674 lgsqrlem3 27675 rpvmasum2 27839 dirith 27856 foresf1o 33100 ofpreima 33259 fnpreimac 33264 1stpreimas 33299 indpreima 33432 s3clhash 33512 pwrssmgc 33561 cycpmconjslem2 33716 cyc3conja 33718 exsslsb 34229 dimkerim 34259 elirng 34318 irngss 34319 irngnzply1 34323 locfinreflem 34472 qqhre 34652 sibfof 34972 cvmliftlem6 36055 cvmliftlem7 36056 cvmliftlem8 36057 cvmliftlem9 36058 taupilem3 38241 itg2addnclem 38590 itg2addnclem2 38591 pw2f1o2val2 44047 dnnumch3 44054 proot1mul 44196 proot1hash 44197 proot1ex 44198 wessf1ornlem 46200 preimafvsnel 48461 uniimaprimaeqfv 48464 elsetpreimafvbi 48473 imasubc 50259 imassc 50261 imaid 50262 |
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