![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > mpt0 | Structured version Visualization version GIF version |
Description: A mapping operation with empty domain. (Contributed by Mario Carneiro, 28-Dec-2014.) |
Ref | Expression |
---|---|
mpt0 | ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ral0 4414 | . . 3 ⊢ ∀𝑥 ∈ ∅ 𝐴 ∈ V | |
2 | eqid 2798 | . . . 4 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = (𝑥 ∈ ∅ ↦ 𝐴) | |
3 | 2 | fnmpt 6460 | . . 3 ⊢ (∀𝑥 ∈ ∅ 𝐴 ∈ V → (𝑥 ∈ ∅ ↦ 𝐴) Fn ∅) |
4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) Fn ∅ |
5 | fn0 6451 | . 2 ⊢ ((𝑥 ∈ ∅ ↦ 𝐴) Fn ∅ ↔ (𝑥 ∈ ∅ ↦ 𝐴) = ∅) | |
6 | 4, 5 | mpbi 233 | 1 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1538 ∈ wcel 2111 ∀wral 3106 Vcvv 3441 ∅c0 4243 ↦ cmpt 5110 Fn wfn 6319 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-v 3443 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-fun 6326 df-fn 6327 |
This theorem is referenced by: oarec 8171 swrd00 13997 swrdlend 14006 repswswrd 14137 0rest 16695 grpinvfval 18134 grpinvfvalALT 18135 mulgnn0gsum 18226 psgnfval 18620 odfval 18652 odfvalALT 18653 gsumconst 19047 gsum2dlem2 19084 dprd0 19146 staffval 19611 gsumfsum 20158 pjfval 20395 asclfval 20565 mplcoe1 20705 mplcoe5 20708 coe1fzgsumd 20931 evl1gsumd 20981 mavmul0 21157 submafval 21184 mdetfval 21191 nfimdetndef 21194 mdetfval1 21195 mdet0pr 21197 madufval 21242 madugsum 21248 minmar1fval 21251 cramer0 21295 nmfval 23195 mdegfval 24663 gsumvsca1 30904 gsumvsca2 30905 esumnul 31417 esumrnmpt2 31437 sitg0 31714 mrsubfval 32868 msubfval 32884 elmsubrn 32888 mvhfval 32893 msrfval 32897 matunitlindflem1 35053 matunitlindf 35055 poimirlem28 35085 liminf0 42435 cncfiooicc 42536 itgvol0 42610 stoweidlem9 42651 sge0iunmptlemfi 43052 sge0isum 43066 lincval0 44824 |
Copyright terms: Public domain | W3C validator |