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Mirrors > Home > MPE Home > Th. List > mpteq1 | Structured version Visualization version GIF version |
Description: An equality theorem for the maps-to notation. (Contributed by Mario Carneiro, 16-Dec-2013.) |
Ref | Expression |
---|---|
mpteq1 | ⊢ (𝐴 = 𝐵 → (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐵 ↦ 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqidd 2824 | . . 3 ⊢ (𝑥 ∈ 𝐴 → 𝐶 = 𝐶) | |
2 | 1 | rgen 3150 | . 2 ⊢ ∀𝑥 ∈ 𝐴 𝐶 = 𝐶 |
3 | mpteq12 5155 | . 2 ⊢ ((𝐴 = 𝐵 ∧ ∀𝑥 ∈ 𝐴 𝐶 = 𝐶) → (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐵 ↦ 𝐶)) | |
4 | 2, 3 | mpan2 689 | 1 ⊢ (𝐴 = 𝐵 → (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐵 ↦ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2114 ∀wral 3140 ↦ cmpt 5148 |
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-12 2177 ax-ext 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-ral 3145 df-opab 5131 df-mpt 5149 |
This theorem is referenced by: mpteq1d 5157 mpteq1i 5158 tposf12 7919 oarec 8190 wunex2 10162 wuncval2 10171 vrmdfval 18023 pmtrfval 18580 sylow1 18730 sylow2b 18750 sylow3lem5 18758 sylow3 18760 gsumconst 19056 gsum2dlem2 19093 mvrfval 20202 mplcoe1 20248 mplcoe5 20251 evlsval 20301 coe1fzgsumd 20472 evls1fval 20484 evl1gsumd 20522 gsumfsum 20614 mavmul0 21163 madugsum 21254 cramer0 21301 cnmpt1t 22275 cnmpt2t 22283 fmval 22553 symgtgp 22716 prdstgpd 22735 gsumvsca1 30856 gsumvsca2 30857 indv 31273 gsumesum 31320 esumlub 31321 esum2d 31354 sitg0 31606 matunitlindflem1 34890 matunitlindf 34892 sdclem2 35019 fsovcnvlem 40366 ntrneibex 40430 stoweidlem9 42301 sge0sn 42668 sge0iunmptlemfi 42702 sge0isum 42716 ovn02 42857 |
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