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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 2139 | . 2 ⊢ 𝐶 = 𝐶 | |
2 | fvmptg.1 | . . . 4 ⊢ (𝑥 = 𝐴 → 𝐵 = 𝐶) | |
3 | 2 | eqeq2d 2151 | . . 3 ⊢ (𝑥 = 𝐴 → (𝑦 = 𝐵 ↔ 𝑦 = 𝐶)) |
4 | eqeq1 2146 | . . 3 ⊢ (𝑦 = 𝐶 → (𝑦 = 𝐶 ↔ 𝐶 = 𝐶)) | |
5 | moeq 2859 | . . . 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 3991 | . . . 4 ⊢ (𝑥 ∈ 𝐷 ↦ 𝐵) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐷 ∧ 𝑦 = 𝐵)} | |
9 | 7, 8 | eqtri 2160 | . . 3 ⊢ 𝐹 = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐷 ∧ 𝑦 = 𝐵)} |
10 | 3, 4, 6, 9 | fvopab3ig 5495 | . 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 1331 ∈ wcel 1480 ∃*wmo 2000 {copab 3988 ↦ cmpt 3989 ‘cfv 5123 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-sbc 2910 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-br 3930 df-opab 3990 df-mpt 3991 df-id 4215 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-iota 5088 df-fun 5125 df-fv 5131 |
This theorem is referenced by: fvmpt 5498 fvmpts 5499 fvmpt3 5500 fvmpt2 5504 f1mpt 5672 caofinvl 6004 1stvalg 6040 2ndvalg 6041 brtpos2 6148 rdgon 6283 frec0g 6294 freccllem 6299 frecfcllem 6301 frecsuclem 6303 sucinc 6341 sucinc2 6342 omcl 6357 oeicl 6358 oav2 6359 omv2 6361 fvdiagfn 6587 djulclr 6934 djurclr 6935 djulcl 6936 djurcl 6937 djulclb 6940 omp1eomlem 6979 ctmlemr 6993 nnnninf 7023 cardval3ex 7041 ceilqval 10086 frec2uzzd 10180 frec2uzsucd 10181 monoord2 10257 iseqf1olemqval 10267 iseqf1olemqk 10274 seq3f1olemqsum 10280 seq3f1oleml 10283 seq3f1o 10284 seq3distr 10293 ser3le 10298 hashinfom 10531 hashennn 10533 cjval 10624 reval 10628 imval 10629 cvg1nlemcau 10763 cvg1nlemres 10764 absval 10780 resqrexlemglsq 10801 resqrexlemga 10802 climmpt 11076 climle 11110 climcvg1nlem 11125 summodclem3 11156 summodclem2a 11157 zsumdc 11160 fsum3 11163 fsumcl2lem 11174 sumsnf 11185 isumadd 11207 fsumrev 11219 fsumshft 11220 fsummulc2 11224 iserabs 11251 isumlessdc 11272 divcnv 11273 trireciplem 11276 trirecip 11277 expcnvap0 11278 expcnvre 11279 expcnv 11280 explecnv 11281 geolim 11287 geolim2 11288 geo2lim 11292 geoisum 11293 geoisumr 11294 geoisum1 11295 geoisum1c 11296 cvgratz 11308 mertenslem2 11312 mertensabs 11313 eftvalcn 11370 efval 11374 efcvgfsum 11380 ege2le3 11384 efcj 11386 eftlub 11403 efgt1p2 11408 eflegeo 11415 sinval 11416 cosval 11417 tanvalap 11422 eirraplem 11490 phival 11896 crth 11907 phimullem 11908 ennnfonelemj0 11921 ennnfonelem0 11925 strnfvnd 11989 topnvalg 12142 toponsspwpwg 12199 tgval 12228 cldval 12278 ntrfval 12279 clsfval 12280 neifval 12319 neival 12322 ismet 12523 isxmet 12524 divcnap 12734 mulc1cncf 12755 djucllem 13017 nnsf 13209 peano3nninf 13211 nninfalllemn 13212 nninfself 13219 nninfsellemeqinf 13222 |
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