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Mirrors > Home > ILE Home > Th. List > fveq1 | GIF version |
Description: Equality theorem for function value. (Contributed by NM, 29-Dec-1996.) |
Ref | Expression |
---|---|
fveq1 | ⊢ (𝐹 = 𝐺 → (𝐹‘𝐴) = (𝐺‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq 3939 | . . 3 ⊢ (𝐹 = 𝐺 → (𝐴𝐹𝑥 ↔ 𝐴𝐺𝑥)) | |
2 | 1 | iotabidv 5117 | . 2 ⊢ (𝐹 = 𝐺 → (℩𝑥𝐴𝐹𝑥) = (℩𝑥𝐴𝐺𝑥)) |
3 | df-fv 5139 | . 2 ⊢ (𝐹‘𝐴) = (℩𝑥𝐴𝐹𝑥) | |
4 | df-fv 5139 | . 2 ⊢ (𝐺‘𝐴) = (℩𝑥𝐴𝐺𝑥) | |
5 | 2, 3, 4 | 3eqtr4g 2198 | 1 ⊢ (𝐹 = 𝐺 → (𝐹‘𝐴) = (𝐺‘𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1332 class class class wbr 3937 ℩cio 5094 ‘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-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-rex 2423 df-uni 3745 df-br 3938 df-iota 5096 df-fv 5139 |
This theorem is referenced by: fveq1i 5430 fveq1d 5431 fvmptdf 5516 fvmptdv2 5518 isoeq1 5710 oveq 5788 offval 5997 ofrfval 5998 offval3 6040 smoeq 6195 recseq 6211 tfr0dm 6227 tfrlemiex 6236 tfr1onlemex 6252 tfr1onlemaccex 6253 tfrcllemsucaccv 6259 tfrcllembxssdm 6261 tfrcllemex 6265 tfrcllemaccex 6266 tfrcllemres 6267 rdgeq1 6276 rdgivallem 6286 rdgon 6291 rdg0 6292 frec0g 6302 freccllem 6307 frecfcllem 6309 frecsuclem 6311 frecsuc 6312 mapsncnv 6597 elixp2 6604 elixpsn 6637 mapsnen 6713 mapxpen 6750 ac6sfi 6800 updjud 6975 enomnilem 7018 finomni 7020 exmidomni 7022 fodjuomnilemres 7028 infnninf 7030 nnnninf 7031 ismkvnex 7037 mkvprop 7040 fodjumkvlemres 7041 enmkvlem 7043 enwomnilem 7050 cc2lem 7098 cc3 7100 1fv 9947 seqeq3 10254 iseqf1olemjpcl 10299 iseqf1olemqpcl 10300 iseqf1olemfvp 10301 seq3f1olemqsum 10304 seq3f1olemstep 10305 seq3f1olemp 10306 shftvalg 10640 shftval4g 10641 clim 11082 summodc 11184 fsum3 11188 prodmodc 11379 fprodseq 11384 ennnfonelemim 11973 ctinfom 11977 strnfvnd 12018 iscnp 12407 upxp 12480 elcncf 12768 reldvg 12856 subctctexmid 13369 0nninf 13372 nninff 13373 nnsf 13374 peano4nninf 13375 peano3nninf 13376 nninfalllemn 13377 nninfalllem1 13378 nninfself 13384 nninfsellemeq 13385 nninfsellemeqinf 13387 isomninnlem 13400 trilpolemlt1 13409 iswomninnlem 13417 ismkvnnlem 13419 dceqnconst 13423 |
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