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Mirrors > Home > MPE Home > Th. List > staffn | Structured version Visualization version GIF version |
Description: The functionalization is equal to the original function, if it is a function on the right base set. (Contributed by Mario Carneiro, 6-Oct-2015.) |
Ref | Expression |
---|---|
staffval.b | ⊢ 𝐵 = (Base‘𝑅) |
staffval.i | ⊢ ∗ = (*𝑟‘𝑅) |
staffval.f | ⊢ ∙ = (*rf‘𝑅) |
Ref | Expression |
---|---|
staffn | ⊢ ( ∗ Fn 𝐵 → ∙ = ∗ ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dffn5 6726 | . . 3 ⊢ ( ∗ Fn 𝐵 ↔ ∗ = (𝑥 ∈ 𝐵 ↦ ( ∗ ‘𝑥))) | |
2 | 1 | biimpi 218 | . 2 ⊢ ( ∗ Fn 𝐵 → ∗ = (𝑥 ∈ 𝐵 ↦ ( ∗ ‘𝑥))) |
3 | staffval.b | . . 3 ⊢ 𝐵 = (Base‘𝑅) | |
4 | staffval.i | . . 3 ⊢ ∗ = (*𝑟‘𝑅) | |
5 | staffval.f | . . 3 ⊢ ∙ = (*rf‘𝑅) | |
6 | 3, 4, 5 | staffval 19620 | . 2 ⊢ ∙ = (𝑥 ∈ 𝐵 ↦ ( ∗ ‘𝑥)) |
7 | 2, 6 | syl6reqr 2877 | 1 ⊢ ( ∗ Fn 𝐵 → ∙ = ∗ ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ↦ cmpt 5148 Fn wfn 6352 ‘cfv 6357 Basecbs 16485 *𝑟cstv 16569 *rfcstf 19616 |
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-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-fv 6365 df-staf 19618 |
This theorem is referenced by: (None) |
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