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Related theorems GIF version |
| Description: Equality theorem for function value. |
| Ref | Expression |
|---|---|
| fveq1 | ⊢ (F = G → (F ‘A) = (G ‘A)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | imaeq1 2602 | . . . . 5 ⊢ (F = G → (F “ {A}) = (G “ {A})) | |
| 2 | 1 | cleq1d 1109 | . . . 4 ⊢ (F = G → ((F “ {A}) = {x} ↔ (G “ {A}) = {x})) |
| 3 | 2 | biabdv 1183 | . . 3 ⊢ (F = G → {x∣(F “ {A}) = {x}} = {x∣(G “ {A}) = {x}}) |
| 4 | 3 | unieqd 1929 | . 2 ⊢ (F = G → ∪{x∣(F “ {A}) = {x}} = ∪{x∣(G “ {A}) = {x}}) |
| 5 | df-fv 2438 | . 2 ⊢ (F ‘A) = ∪{x∣(F “ {A}) = {x}} | |
| 6 | df-fv 2438 | . 2 ⊢ (G ‘A) = ∪{x∣(G “ {A}) = {x}} | |
| 7 | 4, 5, 6 | 3eqtr4g 1147 | 1 ⊢ (F = G → (F ‘A) = (G ‘A)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 {cab 1090 = wceq 1091 {csn 1808 ∪cuni 1919 “ cima 2413 ‘cfv 2422 |
| This theorem is referenced by: fveq1i 2833 fveq1d 2834 cleqfv 2880 isoeq1 2925 tfrlem3 2951 tfrlem12 2960 tz7.44-2 2967 rdgeq1 2972 rdglem2 2976 opreq 3005 omv 3120 oev 3122 mapsnen 3334 mapenlem2 3385 mapxpen 3390 aceq4 3557 aceq5lem5 3562 aceq6a 3564 ac6lem 3575 seqval 4665 clim 4877 clim2 4881 hcauchy 5103 hlim 5108 hlim2 5112 hosmvalt 5487 hodmvalt 5488 pjss2co 5634 pjclem4 5653 pj3s 5659 pj3cor1 5661 stelt 5671 str 5698 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-cnv 2426 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fv 2438 |