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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 7039 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
| 2 | fvex 6880 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
| 3 | 2 | elsn 4597 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
| 4 | 3 | anbi2i 632 | . 2 ⊢ ((𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵)) |
| 5 | 1, 4 | bitrdi 289 | 1 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 = wceq 1560 ∈ wcel 2142 {csn 4582 ◡ccnv 5646 “ cima 5650 Fn wfn 6516 ‘cfv 6521 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pr 5390 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6477 df-fun 6523 df-fn 6524 df-fv 6529 |
| This theorem is referenced by: fparlem1 8091 fparlem2 8092 pw2f1olem 9053 recmulnq 10922 dmrecnq 10926 indpi1 12209 vdwlem1 17017 vdwlem2 17018 vdwlem6 17022 vdwlem8 17024 vdwlem9 17025 vdwlem12 17028 vdwlem13 17029 ramval 17044 ramub1lem1 17062 ghmeqker 19283 ghmqusnsglem1 19320 ghmquskerlem1 19323 ghmqusker 19327 efgrelexlemb 19790 efgredeu 19792 psgnevpmb 21636 qtopeu 23773 itg1addlem1 25751 i1faddlem 25752 i1fmullem 25753 i1fmulclem 25761 i1fres 25764 itg10a 25769 itg1ge0a 25770 itg1climres 25773 mbfi1fseqlem4 25777 ply1remlem 26222 ply1rem 26223 fta1glem1 26225 fta1glem2 26226 fta1g 26227 fta1blem 26228 plyco0 26249 ofmulrt 26340 plyremlem 26365 plyrem 26366 fta1lem 26368 fta1 26369 vieta1lem1 26371 vieta1lem2 26372 vieta1 26373 plyexmo 26374 elaa 26377 aannenlem1 26389 aalioulem2 26394 pilem1 26511 efif1olem3 26606 efif1olem4 26607 efifo 26609 eff1olem 26610 basellem4 27145 lgsqrlem2 27408 lgsqrlem3 27409 rpvmasum2 27573 dirith 27590 foresf1o 32700 ofpreima 32864 fnpreimac 32869 1stpreimas 32905 indpreima 33040 s3clhash 33123 pwrssmgc 33175 cycpmconjslem2 33332 cyc3conja 33334 exsslsb 33891 dimkerim 33921 elirng 33980 irngss 33981 irngnzply1 33985 locfinreflem 34134 qqhre 34314 sibfof 34634 cvmliftlem6 35637 cvmliftlem7 35638 cvmliftlem8 35639 cvmliftlem9 35640 taupilem3 37808 itg2addnclem 38167 itg2addnclem2 38168 pw2f1o2val2 43614 dnnumch3 43621 proot1mul 43768 proot1hash 43769 proot1ex 43770 wessf1ornlem 45760 preimafvsnel 47982 uniimaprimaeqfv 47985 elsetpreimafvbi 47994 imasubc 49769 imassc 49771 imaid 49772 |
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