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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 6828 | . 2 ⊢ (𝐹 Fn 𝐴 → (𝐶 ∈ (◡𝐹 “ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}))) | |
2 | fvex 6683 | . . . 4 ⊢ (𝐹‘𝐶) ∈ V | |
3 | 2 | elsn 4582 | . . 3 ⊢ ((𝐹‘𝐶) ∈ {𝐵} ↔ (𝐹‘𝐶) = 𝐵) |
4 | 3 | anbi2i 624 | . 2 ⊢ ((𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) ∈ {𝐵}) ↔ (𝐶 ∈ 𝐴 ∧ (𝐹‘𝐶) = 𝐵)) |
5 | 1, 4 | syl6bb 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 398 = wceq 1537 ∈ wcel 2114 {csn 4567 ◡ccnv 5554 “ cima 5558 Fn wfn 6350 ‘cfv 6355 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-fv 6363 |
This theorem is referenced by: fparlem1 7807 fparlem2 7808 pw2f1olem 8621 recmulnq 10386 dmrecnq 10390 vdwlem1 16317 vdwlem2 16318 vdwlem6 16322 vdwlem8 16324 vdwlem9 16325 vdwlem12 16328 vdwlem13 16329 ramval 16344 ramub1lem1 16362 ghmeqker 18385 efgrelexlemb 18876 efgredeu 18878 psgnevpmb 20731 qtopeu 22324 itg1addlem1 24293 i1faddlem 24294 i1fmullem 24295 i1fmulclem 24303 i1fres 24306 itg10a 24311 itg1ge0a 24312 itg1climres 24315 mbfi1fseqlem4 24319 ply1remlem 24756 ply1rem 24757 fta1glem1 24759 fta1glem2 24760 fta1g 24761 fta1blem 24762 plyco0 24782 ofmulrt 24871 plyremlem 24893 plyrem 24894 fta1lem 24896 fta1 24897 vieta1lem1 24899 vieta1lem2 24900 vieta1 24901 plyexmo 24902 elaa 24905 aannenlem1 24917 aalioulem2 24922 pilem1 25039 efif1olem3 25128 efif1olem4 25129 efifo 25131 eff1olem 25132 basellem4 25661 lgsqrlem2 25923 lgsqrlem3 25924 rpvmasum2 26088 dirith 26105 foresf1o 30265 ofpreima 30410 fnpreimac 30416 1stpreimas 30441 s3clhash 30624 cycpmconjslem2 30797 cyc3conja 30799 dimkerim 31023 locfinreflem 31104 qqhre 31261 indpi1 31279 indpreima 31284 sibfof 31598 cvmliftlem6 32537 cvmliftlem7 32538 cvmliftlem8 32539 cvmliftlem9 32540 taupilem3 34603 itg2addnclem 34958 itg2addnclem2 34959 pw2f1o2val2 39657 dnnumch3 39667 proot1mul 39819 proot1hash 39820 proot1ex 39821 wessf1ornlem 41465 preimafvsnel 43559 uniimaprimaeqfv 43562 elsetpreimafvbi 43571 |
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