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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 4028 | . . 3 ⊢ ∀𝑥 ∈ ∅ 𝐴 ∈ V | |
2 | eqid 2610 | . . . 4 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = (𝑥 ∈ ∅ ↦ 𝐴) | |
3 | 2 | fnmpt 5933 | . . 3 ⊢ (∀𝑥 ∈ ∅ 𝐴 ∈ V → (𝑥 ∈ ∅ ↦ 𝐴) Fn ∅) |
4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) Fn ∅ |
5 | fn0 5924 | . 2 ⊢ ((𝑥 ∈ ∅ ↦ 𝐴) Fn ∅ ↔ (𝑥 ∈ ∅ ↦ 𝐴) = ∅) | |
6 | 4, 5 | mpbi 219 | 1 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1475 ∈ wcel 1977 ∀wral 2896 Vcvv 3173 ∅c0 3874 ↦ cmpt 4643 Fn wfn 5799 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-fun 5806 df-fn 5807 |
This theorem is referenced by: oarec 7529 swrd00 13270 swrdlend 13283 repswswrd 13382 0rest 15913 grpinvfval 17283 psgnfval 17743 odfval 17775 gsumconst 18157 gsum2dlem2 18193 dprd0 18253 staffval 18670 asclfval 19155 mplcoe1 19286 mplcoe5 19289 coe1fzgsumd 19493 evl1gsumd 19542 gsumfsum 19632 pjfval 19869 mavmul0 20177 submafval 20204 mdetfval 20211 nfimdetndef 20214 mdetfval1 20215 mdet0pr 20217 madufval 20262 madugsum 20268 minmar1fval 20271 cramer0 20315 nmfval 22203 mdegfval 23626 gsumvsca1 29113 gsumvsca2 29114 esumnul 29437 esumrnmpt2 29457 sitg0 29735 mrsubfval 30659 msubfval 30675 elmsubrn 30679 mvhfval 30684 msrfval 30688 matunitlindflem1 32575 matunitlindf 32577 poimirlem28 32607 cncfiooicc 38780 itgvol0 38860 stoweidlem9 38902 sge0iunmptlemfi 39306 sge0isum 39320 lincval0 41998 |
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