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Mirrors > Home > ILE Home > Th. List > fvmptg | GIF version |
Description: Value of a function given in maps-to notation. (Contributed by NM, 2-Oct-2007.) (Revised by Mario Carneiro, 31-Aug-2015.) |
Ref | Expression |
---|---|
fvmptg.1 | ⊢ (𝑥 = 𝐴 → 𝐵 = 𝐶) |
fvmptg.2 | ⊢ 𝐹 = (𝑥 ∈ 𝐷 ↦ 𝐵) |
Ref | Expression |
---|---|
fvmptg | ⊢ ((𝐴 ∈ 𝐷 ∧ 𝐶 ∈ 𝑅) → (𝐹‘𝐴) = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2140 | . 2 ⊢ 𝐶 = 𝐶 | |
2 | fvmptg.1 | . . . 4 ⊢ (𝑥 = 𝐴 → 𝐵 = 𝐶) | |
3 | 2 | eqeq2d 2152 | . . 3 ⊢ (𝑥 = 𝐴 → (𝑦 = 𝐵 ↔ 𝑦 = 𝐶)) |
4 | eqeq1 2147 | . . 3 ⊢ (𝑦 = 𝐶 → (𝑦 = 𝐶 ↔ 𝐶 = 𝐶)) | |
5 | moeq 2863 | . . . 4 ⊢ ∃*𝑦 𝑦 = 𝐵 | |
6 | 5 | a1i 9 | . . 3 ⊢ (𝑥 ∈ 𝐷 → ∃*𝑦 𝑦 = 𝐵) |
7 | fvmptg.2 | . . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐷 ↦ 𝐵) | |
8 | df-mpt 3999 | . . . 4 ⊢ (𝑥 ∈ 𝐷 ↦ 𝐵) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐷 ∧ 𝑦 = 𝐵)} | |
9 | 7, 8 | eqtri 2161 | . . 3 ⊢ 𝐹 = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐷 ∧ 𝑦 = 𝐵)} |
10 | 3, 4, 6, 9 | fvopab3ig 5503 | . 2 ⊢ ((𝐴 ∈ 𝐷 ∧ 𝐶 ∈ 𝑅) → (𝐶 = 𝐶 → (𝐹‘𝐴) = 𝐶)) |
11 | 1, 10 | mpi 15 | 1 ⊢ ((𝐴 ∈ 𝐷 ∧ 𝐶 ∈ 𝑅) → (𝐹‘𝐴) = 𝐶) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1332 ∈ wcel 1481 ∃*wmo 2001 {copab 3996 ↦ cmpt 3997 ‘cfv 5131 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-rex 2423 df-v 2691 df-sbc 2914 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-br 3938 df-opab 3998 df-mpt 3999 df-id 4223 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-iota 5096 df-fun 5133 df-fv 5139 |
This theorem is referenced by: fvmpt 5506 fvmpts 5507 fvmpt3 5508 fvmpt2 5512 f1mpt 5680 caofinvl 6012 1stvalg 6048 2ndvalg 6049 brtpos2 6156 rdgon 6291 frec0g 6302 freccllem 6307 frecfcllem 6309 frecsuclem 6311 sucinc 6349 sucinc2 6350 omcl 6365 oeicl 6366 oav2 6367 omv2 6369 fvdiagfn 6595 djulclr 6942 djurclr 6943 djulcl 6944 djurcl 6945 djulclb 6948 omp1eomlem 6987 ctmlemr 7001 nnnninf 7031 cardval3ex 7058 ceilqval 10110 frec2uzzd 10204 frec2uzsucd 10205 monoord2 10281 iseqf1olemqval 10291 iseqf1olemqk 10298 seq3f1olemqsum 10304 seq3f1oleml 10307 seq3f1o 10308 seq3distr 10317 ser3le 10322 hashinfom 10556 hashennn 10558 cjval 10649 reval 10653 imval 10654 cvg1nlemcau 10788 cvg1nlemres 10789 absval 10805 resqrexlemglsq 10826 resqrexlemga 10827 climmpt 11101 climle 11135 climcvg1nlem 11150 summodclem3 11181 summodclem2a 11182 zsumdc 11185 fsum3 11188 fsumcl2lem 11199 sumsnf 11210 isumadd 11232 fsumrev 11244 fsumshft 11245 fsummulc2 11249 iserabs 11276 isumlessdc 11297 divcnv 11298 trireciplem 11301 trirecip 11302 expcnvap0 11303 expcnvre 11304 expcnv 11305 explecnv 11306 geolim 11312 geolim2 11313 geo2lim 11317 geoisum 11318 geoisumr 11319 geoisum1 11320 geoisum1c 11321 cvgratz 11333 mertenslem2 11337 mertensabs 11338 eftvalcn 11400 efval 11404 efcvgfsum 11410 ege2le3 11414 efcj 11416 eftlub 11433 efgt1p2 11438 eflegeo 11444 sinval 11445 cosval 11446 tanvalap 11451 eirraplem 11519 phival 11925 crth 11936 phimullem 11937 ennnfonelemj0 11950 ennnfonelem0 11954 strnfvnd 12018 topnvalg 12171 toponsspwpwg 12228 tgval 12257 cldval 12307 ntrfval 12308 clsfval 12309 neifval 12348 neival 12351 ismet 12552 isxmet 12553 divcnap 12763 mulc1cncf 12784 djucllem 13178 nnsf 13374 peano3nninf 13376 nninfalllemn 13377 nninfself 13384 nninfsellemeqinf 13387 dceqnconst 13423 |
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